Rob its RCWARBIRD , that is the site we are referring to , there are picture and step by step progression of the p40 with an air support and home made bell crank shown from inside the fuse . Great operation .
As far as the rails I have used "square shaped aluminum then cut a line in a lathe , then just use ball link heads form any RC accessory pack taht will slide in the u cut . It work great and its a lot cheaper then the $30 they want for pre-made rails.