I don't know if they are "backdooring" or not, but I do know that it's pretty much SOP when you go to do business there, it's part of the price of the insanely cheap labor.

Speaking HYPOTHETICALLY only:

Now, let's assume they ARE just knocking off Skymaster kits, as you say.
Then how do you deal with a company like BVM who is using them as a supplier, in full knowledge that they are screwing some other manufacturer?
I'm ASKING you...I'm not TELLING you how to feel about this.