unfortunately, the current design makes impossible to use A500 on keyboard trays (a shelf under the table). Keyboard trays are wide enough to have stuff on both sides, but that ACA500 design collides with the table and forces keyboard tray users to keep the A500 on top of the table, taking up too much space and increasing wife factor.
I sincerely prefer to have a wider A500 instead of a taller A500 one. A1200 board could be on top of ACA500, put the A1200 connector elevated some centimeters on top of ACA, put a pair of plastic legs so A1200 turbocard doesn't move and plug the A1200 board leaving the overall set as a "sandwich", just like some hd controllers included space for the HD on top of the memory/hd controller, the A1200 accelerator could be located on top of ACA500. You would need some longer pins and a quite small board with A1200 like slot.
I have made a kick squetch (quite ugly) but I guess it's easy to understand:
-put the 2 CF slots in the front
-put an A1200 cpu like connector elevated some centimeters using some legs like the ones you have used for the 90 degree angle connector
-Put a disk drive like connector to feed externally the board optionally
-lots of space for ACA500 logic and jumpers to disable IDE/ROMS/etc so my lovely Blizzard1240 works ;-)
Last edited by Crumb; 05 February 2013 at 13:40.