The original First Word, which is probably a fairer test as it is about the same age as this version of GEM, works basically fine:
The fonts are a bit funky, and I suspect that might be what scuppering the Plus version, it's when it tried to redraw the text area that it segfaulted. But as a proof of concept, this is indeed a piece of Atari desktop software running on the Lisa.
Anyone want a boot disc image?
Yes, precisely! You just need to make sure that the clip on the top is the same size as the hole in the PCB. I think the ones I use are ~3.8mm, but it's a bit tricky to check right at the moment.
(I have an entire re-cased LC II where everything is mounted with those)
I tend to use self-adhesive nylon PCB pillars / standoffs (assuming you mean to mount the scsi2sd). Cheap, easy and totally reversible. I've also found them useful for all kinds of other things, so I just keep a big pot of them now