They can be held like that no problem. Needs drilling and then thread tapping for the correct screw size.

I don't know what country you're in but you might want to take a look at these power supplies [US]https://www.ebay.com/itm/AC-110V-220V-TO-DC-5V-12V-24V-Switch-Power-Supply-Driver-Adapter-LED-Strip-Light/152134115704?hash=item236be66178:m:mnohYz4NZlT_Dq5l5lWNUMg:rk:1:pf:0 [UK]https://www.ebay.co.uk/...

Good stuff, please keep us updated.

I'm planning on running them at 11.5v which results in ~2A depending on each individual panel. Migrow did a YT video on this and confirmed at that amperage they shouldn't need a heatsink. I'm going to hang them by using thermal glue to attach them to 2 sections of aluminium angle which should give a...

I'm thinking of a build using 5 of them in parallel. Powered by a cheap (£13) 150w ebay supply they should run at 30w each and not require heatsinks.
How is your testing coming on?