The A500 is very easy to put in a tower, imho. Just follow the A500 hack notes on Aminet. You don't really need a GVP A530 accelerator card, any sidecar A500 expansion can be useful with a towerized A500 motherboard (to add hardisk, ram, etc.). If you're handy with a solder iron and multimeter you can do many cool projects. Now if only someone would make a clockport expansion for the a500.....sigh.....