Well... you can do an easily mod just to stop worrying.
Just put a double sticky tape and hold the ribbon on the top of the upper shell instead of touching ACA630.
Done it in the past with my former Viper 630 and had no problem anyway.
Btw I made a video as well testing Bloodwych's ClassicWB AdvSP and AmigaOS 3.9+BB3 booting and some minor usage.
[ Show youtube player ]