@lewm, Thanks for the SOTA tips. I have been been looking at options for the stock motors ever since my latest system upgrades, Eminent Technology LFT-8b and a pair of Von Gaylord Nirvana 130W tube amps. The fluctuation in speed has become audibly disturbing on several records. And looking into replacement motors was, I thought, the way to go.
However, Rudolph Ploeger of Callas Audio made a strong case of sticking with the stock motor with modification, hence my query. Frankly, I am quite uncertain which way to go. Perhaps as @ct0517 noted, a lot of misinformation with the PV's. I will PM a.s.a. I post this.