BC is such a lovely area. Been over twice now as my parents have friends out in Misson, visited Vancouver, Whistler and loads of places in between. So nice.
Welcome to the site man! Starting to get a few Starlets in Canada now. Post up some pics of the interior and we can probably tell you what you're working with. Is it just a re-trim or a completely different interior altogether?
They just twist out mate, the rubber is cut like a corkscrew EDIT: At least, that's the case on my GT. Can't see them changing the design of them though!
Yeah, the o-ring sits exactly where the two metal faces meet, so it seals it from both sides the whole way around. I snapped one of my thermo housing studs too! Just got the stud out then used a bolt, happy days