My A1000 only has Kippers 8MB RAM card (the first one he made, w/o the CF card). I also have ROM adapter for it, but it's not installed because does not fit together with kippers Ram :hammer:
The A508IDE board will fit inside the a1000 by using the cpu adapter which moves it further back in the case so that it does not interfere eith the floppy drive cable coming from the floppy drive itself. I believe there are also other addons that sit elsewhere on some A1000's so height clearance may be a concern, it is possible that by simply adding risers that issue could be solved.
The basic memory board should also fit, i would have to try it, but again, using the cpu adapter should allow it to fit