my best advise, ive own five stock nitro cars, 2 trucks 2 buggys and a buggy converted to a street.........it always seems to me, to just get the buggy running, set high speed screw- slowly gently tighten up, and then loosing it 3 complete turns, then set the low speed needle- turn gently and slowly all the way in dont force, turn 5 complete turns out......this way is usually enough to get a fair running, and starting engine.......then do the pinch test like the last post was talking about, remember, Investing in slightly more fuel a month is better then investing in new engine parts when you damage the engine..........lots of smoke is good, means not burning off all the oil, letting some left unburnt, means more oil lubricating the parts.......try to keep engine low idle.....keeping engine around 220-230 degrees, as the temp of most fuels are designed to burn profficient at 210-216, yes keeping engine running lower idles, and temps may not burn as speed demons would like, but remember other hobbies are for speed too, like i race quarter mile drag strips with my street bike.....enjoy this hobby, because i found no matter how many cars i get and invest into, i never like to let one go