I have installed a pair of MTW cans on My Comp. ARF 2.6 extra with a D.A. 100 and I am experiencing a "pipe effect" in the mid range. I had to cut 2" off the headers to get the assembly to fit due to the blade spar. Has anyone experienced the same problem and if so what did you do to overcome it? When pulling into a hover, there is no throttle response.....plane either falls backward or punches out of the hover with no way to find a happy throttle setting. 28X10 Mejzlik 2 blade and 25X12 Mejzlik 3-blade. The 3-blade softens the effect but I still have no throttle response in the Mid-range.