Alec, I dunno if you read the whole thread, but I've tried two different replacements with the same results- lower left channel relative to right channel, and right channel has phase change (whatever). The waves created with the old stylus are balanced and look like someone else's waves of their own copy of one of the LPs. The implication is the replacements arent compatible.
The audio sounds fine (not spacey) thru earbuds I'm using with my PC.
I'll try switching the R-G wires; if the volume levels for each channel are not better balanced, I'll switch the W-B wires too. Hopefully nothing will blow up in my face and it's mostly harmless.