Sounded like the OP was asking about the high end. Depends on the engine but I too use a glove and a very long screw driver for the low end but I adjust them running. Only time I have to adjust the high ends on my glow engines is when the temp. starts to drop a lot. Here we tune for 100++++ degrees so when it starts getting into the 60s they start to need a click or two to fatten them up, by the time it is in the 30s I will be out on the high end about four clicks then the engines are good until the temps. rise again. Doesn't seem to effect the low ends at all??