Thanks very much for that info.I had searched for those screws and had not found them because they are very well camouflaged.Yes that was the problem,they had worked loose and only needed a little tightening.Now I have a rigid tonearm again.Thanks again.
Loose RB 300 Tonearm Stem
I posted this in the Lenco thread but am looking for general help here.The part where the stainless steel stem of my RB 300 tonearm stem joins the plastic under-carriage of the arm seems to have become slightly loose.This has the effect of allowing the arm to move from side to side even when the base-nut is tightly holding the tonearm in position.Does anyone know of a fix for this?