Well, the mount is back together and everything went smoothly (sorry). The mount and scope are reunited awaiting hopefully half-decent skies tonight
I've never used moly paste before but I have to say it looks the goods. The tube I got from Suzuki was 50g, cost $15.00, and I reckon I would have used about 10g, which included covering the gear sleeve completely.
It's made a significant difference to the amount of play, and the movement is silky smooth. I thought the RA axis was smooth, but now in comparison it isn't so I'll get to that next, maybe in a few weeks. I'm also going to try and track down a SCP insert for the polar scope, so will do both in an afternoon.
Thanks for the advice.