the tensor is a baby to fly, if your noticing tail movement maybe youre flying it to fast it was built for indoors and slow speed plane, but we all dont have the luxury of a gym so here are some thoughts on the setups, bamboo = to heavy the best thing for this and all foamies is light as possible, if you desire a stiffer tail section try some kevlar thread, an easier way to pervent breakage is some scotch glossy tape on the leading edges, then lay it down good with a covering iron, the biggest thing to remember is this plane was not designes to be a tank it was designes for a competition and was being flown by a pro pilot, another factor is if your using the rim fire motor it spins less kv's than the suggested motor which does 1320 compared to 1000. this would require you to use a 3 cell perhaps, making the overall weight of your plane more, lighter not only for better flying but when you crash its simple physics you have less mass behind your crash developing less breaks