I am putting my A500 and ACA500 in there with one of Stephens adapters that extends the bus and adds a ZORRO II slot . My A500 already has a 2 MB Agnus chip, so this will be a pretty robust solution. I have not decided what I will do for a keyboard, yet. Maybe I should just add a RapidRoad USB to my ACA500 and use a USB keyboard and mouse with it.