Quoted:
Id appreciate a explanation (and maybe some drawings and a parts list (IE what trunnion and where did you get it, and what rivets)) of the trunnion swap! If this is a DIY kind of thing for me, I am game!
I bought a Romanian under folder stock and trunion off of gun broker. The Draco uses a vigin trunion which is just a underfolder trunion that didn't have the holes machined in it.
All you have to do is drill the heads off the old 2 trunion rivets, swap trunions and install new rivets. I don't have any special tools for rivets and wasn't going to buy any to just install two so what I hid was place the head of the rivet on the side of a hammer (to use the hammer as a backing bar) and then formed the other side with a regular 16oz hammer. It only took a minute and they came out looking just like the factory rivets.
The only other thing to do is drill the holes I. The receiver like the pictures show above to match the trunion. They install the stock parts.