Thanks again for your guidance, Mark-sf. After lots more tweaking, I discovered how the position of the leaf springs can be adjusted just enough to centre the platter – as you pointed out in your first post. So I’ve got it pretty much sorted now. The platter is central, and the top surface is exactly level with the cover plates – until I place the drive belt over the motor pulley! It’s a recently purchased replacement belt, and I suspected right from the start that it might on the short side, as it was a tight-ish fit just around the drive surface of the platter. Can you recommend a reliable supplier for replacement belts?