Precise geometry vs fine-shading topology?

[Max Murtazin]

I've not checked closely, but in this configuration they should work easily. Keyword is "interpenetrating": since this part is not transparent you can hide unwanted portions of primitive geometry inside the part.

I tried to do that, but it still doesn't fit too well. Cyls needs to be extended more than what length of the cylinder is, leading to condline ugliness like this: