I also have a pretty heavily modified A500. It has Phoenix Rom installed so it can switch between 3 Different Roms. It has the Expansions Systems Baseboard that adds a RTC and an extra 4MB ram.The GVP A530 has 4MB of ram installed also. Its one of my favorite amigas to use but I seem to have misplaced the power pack for the A530 . I was hoping to find an adapter to use PC power supply but it appears they are no longer stocked...