Thanks for that even if it turned out to be a lost path. At least the picture might be an inspiration for someone that can do woodworking.
It looks a lot like a simple press on cap that he added to the stock button. A machine shop would be nice to have for this but anyone that is at all handy with basic metalworking hand tools and has a bench with a decent machinist's vise could make one.
Drill a shallow hole to a snug fit over the existing button into the end of some round rod. The unthreaded shank of a longer machine bolt is a cheap and common source for metal for something like this once the threaded portion is cut off with a common hacksaw and filed flat and square to the shank. Then cut off the button and using a small triangle file cut some simple checkering. Finish up by either soft soldering or epoxying the button onto the stock pin. Add any embellishments such as a slightly domed profile to the operating edge prior to doing the checkering as you see fit.
It looks a lot like a simple press on cap that he added to the stock button. A machine shop would be nice to have for this but anyone that is at all handy with basic metalworking hand tools and has a bench with a decent machinist's vise could make one.
Drill a shallow hole to a snug fit over the existing button into the end of some round rod. The unthreaded shank of a longer machine bolt is a cheap and common source for metal for something like this once the threaded portion is cut off with a common hacksaw and filed flat and square to the shank. Then cut off the button and using a small triangle file cut some simple checkering. Finish up by either soft soldering or epoxying the button onto the stock pin. Add any embellishments such as a slightly domed profile to the operating edge prior to doing the checkering as you see fit.

























































