I have had a Webra 46 in my profile for some time and it was great, heaps of stickbut have now switched over to four strokes on just about everything and I find that they pull better especially vertically,and are also more fuel efficient which translates to longer flight times.I have a Enya 53 a TT54 a OS 40 Saito 65 and a RCV 60 all run very sweet and I have had no problems with them to date.My suggestion would be give a fourstroke a try.