Does anyone here have experience disassembling a Baldwin Model 10 church organ? I have one from the mid-60s, which has been in my barn and now needs a complete cleaning throughout before I try to get it running again.

Every attempt to start disassembly runs into a blind alley -- something blocking something else. I have the service manual, but that is largely devoted to the schematics.

Anyone? The first (correct) screw would probably help. Thanks.