I have an 1884 trapdoor. My eyes are at the point that the fine sights can no longer be seen clearly. I would like to mount a vernier tang sight but can't find much info on what would work. Track Of The Wolf has a number of creedmore sights that look like they might work but don't mention anything about fitting a trapdoor in the description. If anyone has any experience with this type or project I would appreciate anything you could offer. I don't need a 300$ sight. This is a parts gun but a good shooter.