Concerning Protos idea to build in a 3,5" HD
Better add a 2,5" HD into your Falcon case, the problems the build in of a 3,5" HD could create can destroy all your fun with the machine. I know, I published such an article in one issue of my magazine about 10 years ago as I did the same, but the Falcon died a few years later because of not reparable damages on the motherboard (broken layers) as the case will not close right anymore and there will be a steady pressure on the mainboard. Especially since the prices for 2,5" HD are quite cheap nowadays you really should think twice before another Falcon will pass away...
Undercover Magascene - observing the Atari scene since 1993