Ill be posting a modification section in my "Bdavison's E-flite Blade Assembly" thread soon on how to install the E-sky Bell/Hiller head onto a Blade CP. It can be done with little effort. Easy change. Im waiting on the head, Bill Altman said he had one ready to go, so as soon as I get it, Ill start building it and post pics of how to assemble it onto the Blade. He already has his converted, and it flys 100% better than the original stock head.