Bob, once set a glow engine does not need much messing around with. Set your top and low end as I described, then when your ready to maiden, richen your top end "high speed needle" around 6 or 700 off peak rich, every few flights lean it by a click or two, ending at 300 rpm rich after a gallon or two of fuel. This is a nice easy break in if your concerned about it. Of course others may have different takes on breaking in a four stroke.