The only problem I have had with my XLS .46 is with a pitts muffler. It has/had no fuel draw or tank pressure. I ended up puting a Pery osc. pump and have not had a problem since. The needles on the Magnums have a steep angle so they are sensitive as compared to O.S., Super Tigre, Enya, and others. A 1/4 turn on my O.S. and SUper Tigre are about equal to 1/16 of a turnon my Magnums. The .46 does have power.

Dru.