Hi Guy, re the fitting the easiest way to fit , smear some HMP grease on the adaptor fit rollers ,fit adaptor to shaft,hey presto rollers stay in place ,not to much grease can gum up plates but it works ,well it does in freezing uk ( summer) not so sure in Oz . I've just done this 3 times this week Kept forgeting something ( old age ) and it wasn't a pain last time took onlt 2- 3 mins to fit adaptor bearings outer and inner baskets and start tightening nut. hope this helps Bob. ps had a plunger when I was 16 used same on it worked okay.