Hello, everyone, I know that we each have our own way of locking the yoke. But I wanted to share my version of a gust lock that I put together for my '65 M20C. Pictures below, parts as follow:
(2X) RAM RAP-B-200-1U - Single socket arm; (1X) RAM-B-121BU - Yoke Clamp Base with B-Size 1-Inch Ball; (2X) RAP-276U - PVC Pipe Socket with Composite Octagon Button; (1X) RAP-PP-1112 - RAM 12" Long PVC Pipe; (1X) RAP-B-400U - RAM Tough-Claw Small Clamp Base with Ball. Totaling around $93.00.
Once attached it's rock solid, the aileron and yoke stay in place. The only thing to note is that I used permanent adhesive to join the pipe sockets to the PVC pipe.