Originally posted by AtomHeartMother
Dubro makes a good set. I've got 4-40's and ball links on my big gasser. Tower or your local hobby store should have them. You'll just need to get 4-40 rod threaded at both ends, the right length. Might only be able to find a full length thread. I have a 4-40 die but quickly found that your can't run threads on 4-40 sized rods. The ball links won't fit...grrrr. The threaded rod you buy at the hobby store has rolled threads which are just a tad bigger in diameter. Anyway, that's what I'd do. Also, I run hitecs in a lot of my stuff and I've been happy with them, BUT I'd say the futaba's have less slop around center which is really critical when you'r talking speed and 3D type control surfaces. I'd try the ball links first, if that doesn't work-either brace the tail or drop some coin on some higher end servos.
I disagree with the full length threaded rod for push rods. That stuff is to flexible and will cause flutter. I buy the 4-40 rods that are threaded on one end. Great planes makes a solder thread for 4-40 rods. All you have to do is put your ball link on one end, measure and cut the rod off at the non-threaded end. Now scuff up the rod and I take a triangle metal file and file a couple of shallow grooves in the rod and then solder the 4-40 end onto it. I've never had one fail this way. This is much stronger than all thread and looks good. You can always make your rods from carbon fiber tubes, but not really necessary. I've got the above mentioned rods on a 36% edge 540 and have never had a problem.
Andy