Hi jotd! Love the 'conversions', I own a lot of these already, repurchased to continue to support your great work!
One quibble: I've noticed a few games (Commando, Ghost'n'Gobblins, Dig Dug II, etc.) are offset Horizontally (almost aligned to right) on my RG52 Mini, using PUAE for RetroArch. I find I need to adjust the Horizontal position to around -32, and maybe the type of cropping (Vertical vs Vert+Horz) to get it to be centered correctly. I'm guessing it has to do with being output to a widescreen display. Was hoping that maybe this collection would be different, but it is not. I haven't observed this issue on my A500 Mini.
The collection pieces (CD32 splash, Amiga DOS windows, selection menu, et al.) are all aligned correctly, and otherwise, things work fine! It's fun revisiting the Arcade Games of my Youth. Thanks!