Fallguy wrote on Apr 22^nd, 2015 at 1:17am:

Gavia, I have seen that style some place before. I always wondered about the amount of torque you would be putting on the seat mounts.   How long have you been using that type of yoke?

I adapted the design from someone else.  His yoke hooked onto the back seat rail, while mine locks onto it.  Its first trip was last spring.  The torque never occurred to me, but on my second trip last year - after repositioning the screws - it was just fine.