i am building a u 47 as well... and i am at that stage where i am doing to hull work. if you want me to take some pictures of my hull. just send me your email. alot of people on here helped me out alot..
you can talk to bob eisller. he sent me a few. then i got to meet him at the regatta,,, real nice guy
the forward dive plane servo i am using is the waterproof traxxas. i just have it mounted in the forward section on the ff area. and just have the cable coming into the forward end capp
hope to hear from you
and by the way... welcome