Milltek with HFC's berks is a great sound Not loudest but no drone in the cabin and a nice deep sound. PM Wizard he has a Milltek , see half way down page 6 of this thread:-
viewtopic.php?f=176&t=55095&hilit=milltek&start=75
Try some PlusGas instead of WD40, WD40, although having some benefit is more of a moisture dispersant. It is interesting that WD40 now sell a rust penetrator/release agent too
Obviously a piece of cake then!! Respect Way to go buddy, I've just finished decorating one of the bedrooms and was feeling quite a sense of achievement until I read this Can't wait to feel the power