ORIGINAL: Dr1Driver
Well I guess I just had a brain fart, I just put tape around the rod for a nice fit.
I sincerely hope you're joking.
You've found out that a little slop in the linkage turns into a lot of slop at the surface. replace the bellcrank. If you're using 2-56 linkage, drill the holes in the bellcrank with a #50 or #51 drill bit. The wire will be tight in the hole, but that's what you want. You CAN swap out for 4-40 linkage, but it's not really necessary on this plane. If you don't drill the proper size hole for 4-40 (#44), you'll have the same problem.
Dr.1
I was giving him credit for being able to drill the right size holes. On the other hand, a lot of modelers have a terrible selection of drill bits to choose from and may as well use a hammer and nail to make the hole.(Not a recommendation
) Arm holes for Z-bends and L-bends are notoriously oversized because of the difficulty getting the curved portion through the hole.