The more money you spend the shorter the lifespan seems to be in my experience.
yep I'd go along with that - ave built up a fairly good stash of original spares for me collection so if anything needs doing i usually just fetch a spare out of the garages - keeping an eye open on ebay for stuff that'll come in handy eventually (at the right price) is a good investment
me 110 that i use daily does look like it hasn't had anything spent on it since it was born in 1989 - just sensible regular maintenance, but it's been to Orkney and back within 48 hours a few times recently and it's purring
kiss of death eh