One other issue of interest about the Dust Bug.
The turntable below is a very low serial number Thorens TD 150. It is the middle one.
That turntable has a very low serial number. The Thorens TD 150 was introduced in 1965, I bought that TD 150 in March 1965. In those days there were no plinths and you could buy just the turntable and no PU arm or cartridge. The TD 150 was the first belt drive turntable which has been widely copied. The motor was a Swiss Papst synchronous motor with no speed control. The speed is set by the AC power cycle.
In the instruction book, which I still have, it states that the speed is set deliberately slightly fast, but use of the Cecil Watts Dust Bug was encouraged and then the speed would be exact. And so it is, and it has always been used with a Dust Bug. At that time the Dust Bug achieved almost universal adoption by record enthusiasts. The take up was fast an universal.
The only change I have made to that turntable besides changing PU arms, is to change the Pabst synchronous motor from a 50 Hz to a 60 Hz motor when I moved to North America. It has given great service.