Marbles tang sight

[GOPHER SLAYER]

I have a Marbles tang site and I need to change the site stem to get enough elevation. If you know something about this I would appreciate some help. I found a taller stem on ebay.

[DaveF]

I did stem change-overs on a couple of Marbles tang sights sights years ago, and all I can add is be careful not to lose any of the very tiny detent ball-bearings from either place on the sight, and don't bend the very small cross pin in the base of the stem when swapping it over.
From google:-
https://www.levergunscommunity.org/viewtopic.php?t=4102
2017-07-01 · Marbles has a tang sight with interchangable elevation stems now and they can be changed in just a few seconds using an allen wrench. Good for shooters who shoot competition and different ranges as you can have a sight stem set for each yardage and switch them out before the next relay. Video can be seen on Marbles web site.