RE: tuning help
If it dies when you brake the idle speed screw could be set too low and you have the trim on your controller to set the idle higher...DO NOT rely on the trim setting to set the idle....make sure you have everything (servo and controller to their centered/neutral position with all electronics ON)...check the opening in the carb...it should be about 1/16 (when fully closed)...maybe a little more or a little less..every engine varies a bit...and yes the LSN will affect the idle speed...I would suggest resetting everything back to zero (see above) then start over from there....
Remember...adjust one setting at a time while tuning (small adjustments 1/16-1/8 turns at a time) and give it chance to get use to the new settings...they won't take affect immediately...the biggest thing is PATIENCE...I can't stress that enough...
Start over from scratch and see what happens.[8D]