The compressor tester I used had an instruction manual which I read before use and thats where i got my information!!

Im changing the tappets because I doubt they've ever been renewed!!
Thought I might as well seeing as im stripping the head down.

Im changing the head gasket obviously when I take the head off, so hopefully that will rule that out.

Yeah I know it could still possibly be the rings but for the time being im ruling out what I know.