Just out of curiosity - I've come across various rules of thumb for copper compression joints eg:
finger tight then 1-1.5 turns,
or spanner until olive just grips then some random small amount more.
I only ask, because I used a cap off 22mm brass fitting today, which needed no more than 3/4 turn after finger tight to compress the olive into the pipe. It seemed to have a pretty decent hold after 1/2 turn.
Do they really vary this much? I seem to remember getting more turn on previous fittings I've used.
I disassembled it to check, being convinced it wasn't enough, but no, just right - olive nicely biting in without excessive deformation.
I even used a tiny smear of compound on the outside of the olive as lubricant.
Cheers
Tim