Question regarding First Model American repair

[Win38-55]

A friend of mine has given me his original First Model American to fix. The First Model American had a hammer actuated cylinder stop. A trigger actuated cylinder stop was first used in the Schofield a few years later. When I took this First Model American apart, I discovered that someone had put in a trigger for a trigger actuated cylinder stop. The cylinder stop itself was a badly ground down version that essentially did not work.

Question: Can I keep the Schofield trigger and just install a 'new' trigger actuated cylinder stop (assuming I can find one)? Or are the location of the pins such that I will be forced to return it to a hammer actuated cylinder stop? If the latter, I would need to scrounge up both the right type trigger and a hammer actuated cylinder stop, which might be really hard. It would be easier to simply install a new trigger actuated cylinder stop if the Schofield system will work on the First Model American.

 

[Win38-55]

Just got some input from David Chicoine. He says that the hammer actuated cylinder stop in the First Model can be replaced with the trigger actuated cylinder stop found in the Schofield and later Top Breaks, provided all the relevant parts are replaced (trigger and cylinder stop).