Originally Posted by
jeff4912
Should I use 4-40 steel rods for this or 2-56 steel pushrods?
Does it matter if they are not perfectly snug(but slide freely of course) with the outer tube since they are rigid?
Use the 2-56 rods and here's a tip for you.
Use the plastic rod as a bushing, not the whole rod but 1/4" pieces of it spaced out along the metal rod and glued in place with ca. It will be as slop free as the plastic rod was. Be careful that you don't place a bushing in a position that will allow it to come all the way out of the outer tube as that can cause a control surface to lock in place.
I have been doing it this way for years and it has always worked well for me. You could use the entire inner plastic tube as a bushing but I've found that that usually causes a little binding due to the straightening effect of the metal rod.