Not to butt in (but why not?) but the bulk of the conversation seems to be over on lemon - which isn't surprising since this announcement:

https://www.lemon64.com/forum/viewtopic.php?p=1056614#p1056614

Which to save traffic I shall quote a portion of:

So it appears that they will, unsurprisingly, target C64 fans rather than Amiga (which makes sense since Amiga has little to do with C= and hasn't for some time). Whether or not this is still on-topic for this forum is debateable, but it does seem that an Amiga fan forum would at least be adjacent to what's going on over that side.

And yeah it's a souped up C64 not unlike The Spectrum or The A500 I suppose.

I still associate Commodore with the Amiga. Not just C64 (besides I never owned a C64). So I associate it more so with Amiga. I'm sure there is lots of others like me.

What would the steps be for restoring an Amibench that no longer launches correctly?

It gets as far as the splash screen, then crashes/goes back to the system menu when it gets to the Workbench-like screen.

I've tried using the Restore options with no luck

Edit: Rattled through some more Advanced Re-install/upgrade options. Seems to have got all back to how it originally was. Now to re-install stuff again!

I have the same problem when I mess something up. I usually go to AmiSphere Profile=>Advanced Update=>reinstall first three .lhapps

ScummVM RTG works (sorta)

The back plate is rattling because it is not tall and wide enough to fit the grooves in the top and bottom parts of the case. I don't know if it is on purpose because of the case moulding variations / orangepi+daughter board placement variations or who knows why. I personally installed passive dual side heatsink and made a custom back side metal grill so the hot air can escape. If you need any help regarding modeling or making custom parts, let me know. CAD/CAM is what I do. I would consider helping you design what you need for free.

Sounds interesting. What does your A600GS custom back plate look like?

That's a great idea, I might do the same.

If you mean the weights idea here is one cheap and easy solution. Go to hardware store and buy two galvanised steel perforated plates 80x40x2mm. Two of them give perfect weight increase to A600GS, they fit in the middle of the bottom part of the case and they won't rust. Then isolate them with electrical tape or put some isolator between the bottom of the daughter board and those plates. The plates are easily fixed to the bottom of the case with a glue gun and can be easily removed without any damage. 15 minutes of work

Good luck