Is that Milton Lumpkey?

don't you need a super high-Z di for a piezo to not sound rough?

Chances are your mortar/pestle cannot be glued reliably, there is likely tension on the wood and seasonal/humidity variation will make it move… I’d maybe fill the crack with propolis from a beehive

I have a 12ch tangent In pieces, doing recap and some hotroding. I do have a set of documents/schematics. The switches are all mechanically latching so maybe they where replaced with wrong part or are broke. Dirty contacts and bad caps if they are 40+ years old are common issues. Corrosion can be a ...

The real old style from the ‘90’s brewed by heilman in lacrosse.

Either tonearm wiring/cartridge is acting as antenna or fm demodulator section is leaking in.

Is there an fm antenna that you can disconnect? Or does disconnecting phono cartridge change things?

Fat tone from the filament transformer?

Does this unit have the ability to chase/slave via the tape in/out? I think it does:
You would print the tape out signal to a track in the daw and set the drum machine to slave to that…Probably looser than midi and not midi —might be an option. You’d likely need a special cord