Take a look at the AA964 Princeton schematic instead. A Princeton without reverb is just a Princeton....Two preamp tubes instead of four. If you're looking for the extra gain stage the reverb model uses to mix the reverb singal back in, you'd have to add that triode stage from the AA1164 schematic. You'd have the other half of the tube doing nothing though. Your room mate should be able to look at the differences between the two circuits anyway.