Reducer, Reverser, Gas Pedal.
I used a Brodak 3-line bellcrank for the first time. The first thing I discovered it that it has over twice the throw that the carburator wants. Since I didn't want to overpower the carb or make the BC over-sensative by restricting it's throw, I knew I needed a REDUCER.
After some discussion with scale and carrier guys, I came to be convinced that I should PULL for HIGH at the handle. That made my system backwards. In some cases, I could have flipped the carb arm, but that put the throttle rod into the exhaust path and (maybe) where a muffler wanted to be. Hence, I needed a REVERSER.
While I was at it, I designed the unit so I can work it with a finger on left hand, and not have to have somebody jockey the GAS PEDAL out at the wingtip.
Materials required : worn out bellcrank and 6/32 lag bolt.