Hi, ive been reading through the huge thread about the oil catch can and im tempted to do it. i also want to remove\simplify the pcv system as i have 2 splits in it. can i simplify the pcv first then do the catch can later on? and i know most have got there catch cans from the states but i was wondering if i can get any from this country an cheaply. also what size inlets do i need? i have seen some 15mm OD ones, will these be big enough?