This is exactley what I was saying in the other pitts challenger thread i started about engine size. You were telling me this plane could take a 70 plus 4 stroker no problem. I haven't maidened mine yet with the saito 65.....and balance was not a problem with the extra engine weight..I mounted my 5 cell battery just in front of the servos. I am using hs85mg in the wings...should be lots. I think it would be some major wing surgery to relocated the struts mounting tabs. I just epoxyed them real well. Hopefully I have better luck on not loosing a wing. I think an average 40 stroke would be more than enought power for this little plane. Why fly at less than half throttle all the time? Not designed for 3d by any means, just a nice little scale plane. I wish nitrostaff would give his opinion on this strut issue.