Many thanks for those contemplating my problem with the Class M topworks screw.
Mario has provided the blindingly obvious solution which is that the screw pushes against the boss in the middle of the Class M deck ( located between the two right hand mounting blocks) and acts as firstly a stop to prevent the topworks moving to the left and slackening the drive belt, and secondly as a belt tensioner. My problem was looking at the topworks in isolation and not when it was mounted to the deck. At least I now know how to make minor tension adjustments to the drive belt on my two Class M's. Best wishes to all. Mike _______________________________________________ Phono-L mailing list http://phono-l.oldcrank.org
