I just purchased a used Pamlico 135T Tandem. I can’t figure out (I think there is a missing piece) how to lock the front seat in place. The tandem design is such that there is a metal tube attached to the back seat in the center. The front seat rides back and forth on this tube. There are locking holes on the tube, but I don’t know how to lock the seat in place on the tube. Any ideas?
Mine has a plastic barrel bolt on the back of the seat that locks it into that tube.
I ended up using a piece of 7/16th" diameter Delrin.