Ah, I see. You pretty much answered my questions completely!
Acetone huh? Should be pretty cheap to get... though I'm guessing that since acetone works, pure isopropyl works too right? I might get that instead since it's a lot more easy to dilute and dispose (i.e. mix with water and down the drain).
Surprised with such simple tools that bearing of yours lasted decades :o
I suppose avoiding maintenance also means missing out on the experience too.
Regarding the wheels, it is fortunate I got the Macroblades - they are designed to be upgradable to have 84mm wheels, which I may get in time! Incremental, but should still be noticeable.
Though... with your answers, I now have a few more things I'm curious about: