I bought one several months ago but it has European hardware, mine the drive shaft is larger than 3/16"!! and in order to remove it you have to do it from the motor side (pull it off toward motor)because the flex end has square section that slip into the drive shaft. The next problem is the strange design in the front, in slow speed the water will be channelled toward the hatch and INTO the hull. I spend a lot of time water proofing the hatch. The boat is also very heavy. It's so heavy that the stock motor with 3S will barely get it on the plane. You may have to adjust the drive angle to help this. The low tips of the wings are also dragging and to make a matter worse, they were about 1/8 thick at the tips whcih I later sharpen them off. I put the Feigao 540 9XL with 4S and it still somewhat under power, so now I have the Feigao 850 8L but I had to move the motor backward to correct the CG (it's way forward to begin with) which required the cut open on the back top. I didn't get a chane to try the new setup yet because the pond is frozen. I may end up cutting the tips off the wing. In stcok form, the boat makes funny loud noise just before it gets on the plane and I think it's the loose fit shaft and weak support. If you want to get one, search carefully on the site, there are several more with better prices. Mine has offset rudder setup though.