Researched doublers in Garmin, Van's and FAA 43.13 documents. Decided on a hole pattern for the transponder antenna doubler. Started looking at the best forward/aft position for the transponder antenna doubler and realized it would be better to get the aileron/elevator controls installed first to give me a better idea of the required clearance around them.
Installed the F-633-R and L control column mounted. Worked to install the control column. Had problems with friction due to binding. Researched on vansairforce.