The other Problem with The Expansion Ports on the Amiga 1000 and Amiga 500 were not identical. I had a few A1000 Expansion devices ( 2 - AX1000 (2MB Ram Expansions) and 1 SA1000 (SCSI Adapter)). To use then on the A500 they needed to be upside down, which meant the A500 needed to be raised to accomidate the adapters height.
Shaf