I forgot about the buttercups: it looks like with buttercups, there _is_ potentially a connection from the lowers to the outside: through the knob hole _and_ the buttercup holder, _if_ the threaded hole on the bottom of the buttercup holder for the bottom bolt is a through-hole, not a blind hole (I can't find a picture that shows it).
Looks like there is a dynamic seal at the top of the buttercup holder, but I could definitely see the action of the cups slowly sucking oil into the buttercup holder. Then, _if _the bottom bolt hole is a through hole, that ingested oil would probably get pumped out if the knob fell out.
Still wouldn't effect damping.
Feb. 8, 2023, 9:44 a.m. - Justin White
I forgot about the buttercups: it looks like with buttercups, there _is_ potentially a connection from the lowers to the outside: through the knob hole _and_ the buttercup holder, _if_ the threaded hole on the bottom of the buttercup holder for the bottom bolt is a through-hole, not a blind hole (I can't find a picture that shows it). Looks like there is a dynamic seal at the top of the buttercup holder, but I could definitely see the action of the cups slowly sucking oil into the buttercup holder. Then, _if _the bottom bolt hole is a through hole, that ingested oil would probably get pumped out if the knob fell out. Still wouldn't effect damping.