I dont see the problem really, stick in a cpc regardless. Because A: anything happens or they want something changing most of the time you will be first one back. B: i know guys on here will follow the regs by the book but regs do change and chances are at some point it will be necessary anyway. C: i hate following up jobs where bad sparks over the years will just leave the odd thing here and there and we end up with all the bad habits of past sparkys to sort out. just do it now tell the customer that you strongly recommend it.