Metal pins? interesting, very interesting.....
I would use some standard (i.e. non-quick curing) epoxy-resin type glue, like our old friend Araldite, and let it cure for a couple of days in a nice warm place. If you do this it ends up being stronger than the pad or the wood. You don't want it coming off like a flip-flop sandle do you?
The cylinder end caps are nasty plastic things, you might be able to get Elmur Fudd to make you up a splendiferouos Brass one, or you could send gedfinn2 a pound and he will surely have a few for you to choose from. The Mk 1s had a metal end-cap, all the others went for the Polythene.
If you can get Allen headed bolts then that will make it look nicer. You may not have noticed but some of the bolts on the Mercury had been replaced with these, I bought them from some very obliging Hindu chaps in Clerkenwell - they spend 10 minutes looking for them and they were only 40 pence!
As for
PS: Is a Webley Falcon a short stocked Tracker?..... Sorry, couldn't resist.
I don't know, but is a BSA Merlin a Falke 80 that was raised on gin and cigarettes? No-one will ever cough to that one ...