Heard in my family's workshop many, many, many times, when working on some very important thing:
"If it don't fit, force it. If you can't force it, glue it. If you can't glue it, F**ck it."
also
" If it don't fit, get a bigger hammer"
Failure comes in large doses, success comes in small doses, the wise thing to do is to reduce ones appetite.
and my fathers favorite saying when working on something that is very important and needs to be precise:
" good enough for who it's for"