Yes, they did, i felt pretty let down, this is my first build, i took a week off from work and spent more than than trying to get the kit updated with the promised parts. I wanted to write this to followup at least for reference for anyone else buying from the same.
The seller was fine, he was replying to me once or twice i day, probably not easy with the volume they do. But after a lot of reading, dozens of people have posted about the same issue (the motors not mounting with all 4 screws). I let him know that, but from what i gather, the frame is probably based off a plan that different mfg's use- noone seems to be addressing it or even care. It seems to be luck of the draw if you get arms that will mount.
On the cc3d issue, in the end he sent me a cc3d, didn't ask for the wii back even, probably because he knew how disappointed i was. Anyway, it's not about the money so much, but that did mean a lot that he didn't make me send it back and wait until they got it to send me a cc3d, though he had to drop ship it from china, so it may take a few weeks (months?) to get here.
Anyway, the seller was doing everything they could, a lot of times sellers don't know anything about a product, it's really up to the mfg- these are cheap generic "knock offs" so have to expect some corners to be cut, just not fatal corners. Shipping from them was lightening fast, ordered on friday, was here by monday.
Thanks,
Rob T.