Thanks for your help, yes i know Gabriel Tahan, but he lives in Caracas (8 hours away) and i don't have his phone num. or e-mail addres, yes i whant to built from scratch but i heard of using the viper wing with some other fuse that fly much better maybe people making noise!!!, but by now i'm using a Viper and i whant to built another q-500 from scratch as a second plane and i whant to built as it has to be. skined hinges, internal linkage and all the improvements, reinforce the fuse (tricks)

Ruben,J.R