ok right,i feel there is no point argueing with you on this,i have made this modification and it does work if that is your problem.your asking me for the page numbers of the modification as described in rays helicopter manual so here they are:they are page numbers 122 and 123 of chapter 20 look at photos 1,2,3,4 this is the modification and the measuring method that i am describing.is it possible that you are mistaking this procedure for somthing else?