Neither of my DL50's have backup yet, you might be a little rich on the low end if you are having problems with the idle. I posted at the top of this page about wearing a glove, can you imagine what your hand would look like if you weren't wearing a one! Been there, done that. I have yet to see someone wearing a glove at my field here in Florida and there are a lot of gas engines.

I'm flying my GP Ultimate for the first time tomorrow and hope all goes well. The DL50 on it sure has more compression that my other one, but then the other one only has 1 1/2 gallons through it.