Don't know, but a start would be to find the right dia. drill shank, push it in until the lever is held back, then start figuring out the length required to slightly compress the spring behind the trigger plate screw.
DUH. Why do guys that know little of the design of some thing try to answer questions like this? The part has two flats, a cam angle and a hollow for the spring. It's a lot more than a piece of drill bit with a spring to push it.
Well every time I try to start a new topic it tells me to log in. If there is some other method to post a topic/query please enlighten me.
Another DUH. You are posting on this site after register and log in. Why do you think you can post on the Fox Coll site with out doing the same thing ?
