Off set BigSky Rod box

Good afternoon,
I have a GFC topper and am looking to get a RTT for the top. i have a 2024 Tundra short bed. I was thinking of trying to off set my rod box so did not have to put it on top of the RTT. Has any one done this or ideas. I was looking at the Serpa fly rod mounts , but it looks like it might need the “wall” of the roof rack for some of the weight support…

I am also running the GFC 10Rack by JE Design for cross bars.