I have the .91 also. Itried to set the LS the way the manual said but it never stopped when turning it out, just came all the way out. Iscrewed it all the way in and then out 2 turns. I've got a gallon or so through it now and I haven't changed the LS yet. It idles and transitions well. 20 flights or so on it and no deadsticks or any other troubles yet. I love Magnum!