I had an idea to create a flat mounting surface large enough for a Seasucker 4.5” suction mount, specifically so that I could run the Light Ranger mount that they created in collaboration with Devos. I had some plates cut and powdercoated through sendcutsend.com, then sourced some 3/4” long aluminum spacers and added some 1.25” #10 screws and 4 t-nutz.
The square is 4.875” with 4 countersunk holes for the #10 screws. It barely clears the side panel when it’s open, maybe a 1/16” of an inch or so. I had to space if off the side of the extrusion by 7/8” total to clear the hinge. 1/8” of that is just some mounting plates that the 3/4” long spacers sit on.
I haven’t ordered the Seasucker mount or the Light Ranger yet just because I figure there’s a good chance they’ll drop some Black Friday discounts of some sort and I can save a few bucks, but I’m pretty optimistic this will work. The mount is solid and I can shake the truck by pulling on it. Should be plenty strong enough for the intended application and it doesn’t hang very far off the side of the extrusion, unlike some of the 3d printed Light Ranger mounts I’ve seen.
UPDATE 11/22/25: So it works… kinda. It will mount and hold, but you can’t pump it to the point that the orange indicator on the pump knob completely disappears. I think there are two possible culprits. First, while I knew the suction cup would expand beyond the listed 4.5” diameter once you started to pump it I didn’t have a seasucker mount on hand and was hoping that the 4.875” dimension of the square would be enough. It’s darn close. Even with the suction cup meticulously centered I’m wondering if the outside edge of the sealing ring is getting a little compromised. The second possibility is that the vacuum effect is pulling air through the hardware mounting holes once it gets close to maximum vacuum. If so, it’s a very, very slow leak. Not sure how many hours it would take for the cup to lose suction. This could in theory be addressed by adding some silicone to mounting hardware, but then I still haven’t dealt with potential problem (A) above. If I ordered a new plate that was any larger than 4.875” square it would impact the side panel when you opened it. I could change the design file so that the 4 hole mounting pattern is offset a bit, but at this point I’m wondering how much effort this is going to be worth, plus cost. After mulling it over a bit I just decided to order a couple of ram ball components from Amazon, including a 1/4x20 ball adapter that I will attach to the Devos Light Ranger 1/4” adapter tube/mount. While this limits mounting location options it will be simpler in the long run with no concerns around loss of suction if/when the silicone on the mounting hardware breaks down at any point.
Thanks to all who checked out the post and offered feedback, etc. I’ll create a new thread at some point with the ram ball mount assembled and installed.
I had that very same thought about the seal of the hardware in those countersunk holes. Once I get the Seasucker I’ll try it out and post the results. It will be easy to add silicone if it seems like air is getting through.
Looks like you definitely have put some time and thought into your design. Cool you like the SeaSucker Devos Mount. That was all me I’m proud to say that was my idea. Now I’ve actually improved it. https://youtube.com/shorts/q1cZfGUEJcA?feature=share
Thinking about your design which is a great idea. I’d actually just go this route with the adapter.
I’d take the two of these and attach the arm to the track like you did with the plate. Cool thing is now you have the ability to move in around at any angle. Basically any action camera mount will work since they all have the 1/4” x 20 thread setup. So you might already have something in your collection you could use to make this set up. Don’t get me wrong the plate is cool. I’ll just tell you my factory decal with the FX4 causes the SeaSucker to lose Vacuum. So you have to have a smooth surface.
If you want to save a few in addition to sales I’ve included our discount code here. You can buy the SeaSucker / Devos Light from Devos just as well. Devos X SeaSucker LightRanger Mount
Or get the SeaSucker Devos Light and take off the attacment so you could buy one and move it around. I like the mount. We have a great deal of the SeaSucker Products and love all of them.
• Seasucker - Vacuum Suction Mounting Solutions
Mark (& Teresa)
Hampstead Maryland
•Ford Ranger FX4 - GFC Camper V2 # 1919
Nissan Xterra Off-Road - Camp Rig & Kia Soulverlander
I don’t drink LOL. I think if you do the silicon and maybe some clear Girlla or 3m tape over the holes and avoid areas where the seal sits you have a good chance of success!
While I appreciate the suggestion for a ram ball style mount, even though that would be easy to do, it essentially limits me to locations where I have a ram ball available. Unless I swap it over to the tripod pole that comes with the light. I guess my thought behind the seasucker was that the plate would give me a pretty high mounting option on the vehicle that doesn’t interfere with opening the side panels and allow for use of their motion sensor in a mounting location near the tent door, but still allows me to quickly move it to any other flat surface on the vehicle if I need to move the light around. And as Mark pointed out, not having to pack around the pole does lighten my camp load out a tiny bit.
If it works I can open up the mounting plates for order on sendcutsend.com via their marketplace style feature, but people would need to source their own spacers and #10 screws, although that would be pretty easy.
I could, but my intent was to also run the Devos motion sensor. The product instructions state that the motion sensor works best mounted between 5-6” feet. Having it mounted near the top of the tent (when open) would put it pretty far outside of that range.
Before you do much more take a moment to swap the Extra SeaSucker plundger and add the ie grease/lube around the seal. Everything might actually be working!
Plus I was thinking I know you said silicon to the topside of the 4 screws. What about just basking the screws in silicon then put them back in.
I’d start with the swap of the plunger. Just to rule that out. In our one video list above Jan from SeaSucker shows what to do. I’m suggesting this because we’ve had this issue out of the gate with a few. I think it’s the lube that really helps.
As for the motion sensor it may work at that height.
Just like you nice to help others! I wouldn’t ditch your design. I know it will work!
I also forgot to mention 2 other helpful tips with the SeaSuckers. A water spray bottle is your best freind. Blast that bad boy. Winter or freezing I tried and worked well in -2 F and 3F no problems windshield winter fluid.
My buddy Cong who has “4WD is Life” tried this out at Expo East 2025 with his Dirtbox. I hooked him up with Devos so he could try the adaptor on the Amazon Ram mount I included above link for.
For what it’s worth, the original plunger worked great and sealed just fine when I tried it on a window. I appreciate the tips, though. While I do think it’s a cool product the maintenance that is seemingly required, plus the need to have a perfectly flat and clean surface (or in your case needing to carry a spray bottle or extra jug of windshield washer fluid) seems just a little too finicky for quickly mounting a light while you set up camp. At least on a GFC. That’s just me, though. I was giving it some thought and for an extra $10 I can buy an extra ram ball base to mount to the extrusion on the driver side and at least I would have both driver and passenger side mounting options.
I have a buddy that just bought a Radica Moonlander X for his Tundra. There’s a lot of large flat surface spots on that thing so I could see this Seasucker being a pretty good option for him if he’s interested in a Light Ranger. I may just offer it up to him.
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