I hope to have a NIB GMS .47 this weekend and after reading this long and informative thread had a look at a couple engine manufactures sites and found this

http://www.jettengineering.com/tech/tech.html

then look for RC Carb setup ... after reading this information and knowing full well that I will be taking the Carb apart to check that all is OK .. I will use Jett suggested way of setting up the engine for fine tune THEN put it into my plane ( new built Cutlass45) after being set up on a test stand first.

I will add my findings to this thread once the test has been done.