Maybe one of you has built this so I'm throwing out there. I just bought one of these, expecting one for a 29mm motor mount and wound up with a 38mm mount instead. I'm dealing with the vendor to resolve this but it raised a few questions. 1st off, the fin slots were 1/16" longer than the fins. Is this normal? My DX 3 fins fit the slots like a glove so I expected the same with this one. 2nd, since the fins were designed to fit a 38mm motor mount, shouldn't the fin tangs be longer to fit a 29mm mount? If they send me a 29mm motor mount replacement it may cause the tube slots to be even longer than they are now. I'm wondering if I should have them just replace the whole kit. Besides, one of the fin slots was crudely cut as if someone did it with a hand held jig saw.