All our Amigas are getting old. I am down to one somewhat working A 4000 board with the required Buster 11 chip. Paula is pretty bad off. The floppy light is on constantly, and it might as well not be there. So, how bad is it? Second, is anyone still upgrading and repairing these board in the US of A? I have a slightly better board, but with buster 9 soldered on same. I could use a reliable spare.