I recently bought a used RX2 in mint condition (I thought). Upon first listen it sounded great, but I noticed a small amount of wow & flutter. On some records worse than others. And on some without issues at all. My first thought was that the belt was warn and needed replacement, but then again, wouldn’t the w&f be a constant on all albums? Then I noticed that the platter is not completely level with the top alu plate/panel. My first couple of tries, was to see if I had somehow misaligned the platter on its base, but that was not the case. Then I noticed that I could actually press the top alu plate down 3-4 mm at the back, which seems to level it with the platter, and upon noticing that I played an album with w&f without sound and lo and behold a tiny scraping sound after each turn was heard. The vinyl hits the top alu plate when it is warped in a certain way. That must be the issue - the reason for the w&f. So what to do? I assume I can’t just glue the top plate, as it needs to be removed to replace the belt, right?  I have measured the platter, and it is level, so the issue must be the lose top plate, right? I have tried to hold the top plate down with some gaffa tape, not pretty, helps a little, but would much rather do it correct. Help much appreciated. 

Thanks.