I took the dd 450 pro fp to the LHS for the owner to try out.I do this with all my custom heli's to get his feed back.He liked it a lot and I told him I was going home to put the cp head on it. I was hoping that I could just flip the belt and put the cp head on the black angel ms I used. won't work,the stock pro ms is about1/4 " longer so the swash is to low. I used the stock pro ms but had to drill a hole in it for the tail drive pulley.Not easy LOL that is why I used the B>A> ms in the first place so no one would have to drill the ms.I will have to look around for a new one.It's been a long time sense i set up for cp. Lucky for me I recorded all the settings from long ago. It was getting dark but just had to try it to see if it was going to work.The video is bad but for tonight it shows it does work. I need to go over the whole thing in the morning then take it back to let the LHS owner try it out. I think I am on to something good here. I ordered another EXI 450 pro kit because I want a fp and a cp dd 450 pro.