RE: Help my new 37% Carden fails range test
Had a similar major situation with a big Ultimate", tried everything, took a year to eventually get a satificatory range check. Ended up going with one 945 receiver, through a power box and the problem was gone, plane fly's awesome. Your plane does not need 4 elevator servo's. I would eliminate 2 to simplify things. You might consider hooking up everything with one receiver for test check to see if it improves and go from there. These range demons are sometimes hard to find but in our case removing all the complexity straightened our problem out. Hope this helps, Walt