Rebel 20 schematic & FX loop fix pre 'M" head

[Smitty02]

Hey Ive found a copy of the schematic still need to know the fx loop resistor fix though, also the schematic does not have any part values ? is this normal for Egnator, they seem to be secretive with there designs Ive found LOL I dont want to make one. I just want to fix the little beast....