Joel,
As I grew up, my dad was a piano technician. We had lots of player pianos come through his shop. You got a good one, if you got it working that quickly. In order to automate it, you will put the pump right after the bellows. I'm sorry, but I don't remember what cfm pump he used. I seem to remember that he used old vacuum cleaner motors. I say that because they were always so loud. I can't tell you if he used the blower, or sucking side either. I do know that it was low pressure, high volume. He would always put a reostat in line with the motor, to regulate the motor speed. With it cranked up, it would always get loud, and play a bit faster. At low volume, the motor could always still be heard over the piano. If you find rolls for your piano, be aware that the "newer" rolls from about 1960 and up are only 66 key rolls. The older rolls are 88 key rolls. Good luck with your new beer drinking toy!
Dan