Wren is the one saying that JJ copied there MW54 MK2 maybe he did, Wren only publishes the drawings for the MK2 I have a set of the MK2 drawings but I dont have a JJ1200. I dont think it would be useful to compair the 1400 with Wrens drawings. I would say that the JJ motors at least the 1200 and 1400 are more for the home builder type. The person who has tools and can tweak turbines. Much of this uncerteny I'm sure comes from JJ who ever he is not coming forth and speaking out for his motors. JET JOE SPEAK OUT. Maybe low cost is better than saying cheap. The JJs are low cost but not cheap. The parts are well manufactured tolerances seem to be good, at $700.00 a motor thats not cheap.