How to Attach a PVC Prod to a Stock?

First topic message reminder :

I was wondering if there was a way to attach a PVC prod without using cord briddles? I am not a big fan of cord briddles as I think they don't suit all crossbows based on the design. I really only think they suit crossbows from the medieval period to the renaissance. I was considering building a PVC prod for one of my stonebows as they are more durable and resistant to things like dry fires than wooden prods are(not to say I am going to dry fire my prod lol. Even though PVC can take dry fires it is incredibly stupid to dry fire a bow/prod because even if the bow doesn't give the string will. I was only using dry fire as an example because I think shooting spherical projectiles from a bow has a similar effect to dry fires since the ammo is lightweight.) I was going to reinforce it with fiberglass rods to pump up the draw weight also. Taper the ends so it's not so much weight at the ends and it will increase speed. But the big problem I think with PVC prods is it's wider towards the ends and most narrow at the center. Now I am going to taper the ends so they are not as wide as if they weren't tapered. But that's only for the last 3 inches I believe. Pass three inches from the ends of the tips are still going to be wider than the center.

This was the original trigger mechanism used for it. It seems kind of complicated to me at first, but once you realize what part is which it's actually relatively simple.