I had a Wm Evans with a single trigger, and as a Brit contributor here remarked " we never were makers of good single triggers now, were we"
Sometimes my Evans single trigger, a mechanical one, would not reset for the second shot even though it had been checked out by a British gunsmith. I traded it off to a big gunshop for several guns I do use.
However, had I kept that Evans I certainly would have considered a Miller trigger for it.
Good luck, Dan.