The brass puck proved not to be hard enough so I am now making them in hardened steel.
Tests on Mike's very worn TM2 slipper out-drive are looking good and having run my TC02C at the weekend, with the puck-drives on the diff out-drives, I can say that there is no sign of wear at all.
I'm using a penetrating oil lubricant that leaves a film of PTFE after the liquid has evaporated. I'm putting this on the UJ's as well. If nothing else it will repel water. Looks like we are racing outdoors until Christmas at Southport.