I’ve also been thinking doing something like this, just not quite ready to start drilling into the panels. So please share what you end up with.
I’ve seen this setup pop up a few times and thought it was a pretty sleek solution for an external heater mount. But not sure about hanging a tank of diesel off the panel alone - I’d think about integrating the internal supports somehow, probably sacrificing ability to open the panel.
Regarding the struts, from an earlier thread 50lbs sounds like the sweet spot.