thanks for the reply Mike, i have reset the low speed needle w/o collar. it is now set to when the throtle is closed so is the low speed needle any more and it will flood or dead stick @ low-mid rpm range. the more i richen the low speed the sooner it will kill. it will perform great on the ground but in the air it will dead stick when throttle is @idle and a high trim which will run fine on ground. high speed is still within factory setting but leaned all the way.