The actual implementation of this only took about 15 minutes, but I researched it a ton. Originally, the copilot stick just stuck in the socket with nothing holding it there. Supposedly, at some point, somebody pulled up instead of laterally and disconnected it while landing from the right side and bad things happened. Vans then issued a S.B. that calls for you to secure tis with an AN3 bolt oriented laterally (3:00-9:00) 1/2 inch below the edge of the socket. This seems like overkill, especially since they originally had nothing at all holding it in there. Over the years, people have used all kinds of solutions ranging from fancy locking clevis pins to good old velcro. A lot of guys have had success with the push button spring clips, but 90% of the ones you can find locally are 1/4" I decided if I was going to do this, I didn't want a hole any larger than the 3/16" that Vans calls out in the SB. I kept looking until I found a vendor online that sold these with a 4.5 mm button diameter. I paid I think about $12 for the smallest pack I could get, which was a 50 pack, so I've got plenty of spares! 4.5 mm is obviously an odd size for anything I have going on but I went to the big bag 'o used drill bits and amazingly enough, found one that would work (#24 drill bit). I also experimented with bending these into a couple of different shapes. In the 3rd picture below the bottom example is how they come and the top is the shape that works the best