All interesting. I'm surprised by the number of former BSR owners, 7 so far. So they must have been common in inexpensive "starter" systems. And the count could be higher since a few just identified an all-in-one system with no names.
Investigating a Vintage TT to learn if the mechanical interfaces are optimised seems the road less travelled.
We are talking about the Vinyl Source, where the groove modulus interface is used parts of an assembly of parts, where dimensions belonging to certain parts are low microns.
Microns Matter, heavily used TT's with lots of years of service behind them will most likely be measured with tolerances in 100ths of a mm, not low 1000ths of a mm.
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