Listen my cylinders leaked from new, the new ones, and the new new ones. I even took them apart diagnosed the problem took pictures sent them my analysis (rudimentary) and guess what, same crap being sent to new owners. I installed BVM Cylinders and no more leaks. Secondly, I now of one guy that his airplane burst in the air due to wing balsa problem structure failure. Not all these planes are flying yet, mine is close to completion and hope the elevators will hold. I wished I would have never bought mine and I tried to sell it on here several times and no one wants it. The major complain was "did you here about the guy that his wings burst". All the hardware sucks big time peroid! The retract air cylinders will leak at one point due to the design of them. They did send replacement cylinders because the originals failed. These problems are not just from me they are from many who purchased the early kits. My advice to anyone trying to buy one of these jets, try to get them without hardware and buy everything else unless you are very good at fixing things and soldering ALL linkages. I am very unhappy with mine and if I could get it back into the original box(dont have) and ship it to TBM for some credit I would before I fly her.