Hi Steven,
As for the sight, I acquired, I have no initial plans. You just don't see these often and what appears to be pretty good condition. If I had a Low Wall it sure could work for it. I may just have to buy a rifle to fit it on or better yet since, I am now retired, is build a gun.
On the subject of building things I am thinking about restoring the Farquharson. At least to re-install the side mount. To do so I have to determine if the current barrel can be used or does it need to be replaced.
I have had much fun doing the research to discover the origin of the rifle and now I will enjoy the project to restore the rifle. Any suggestions will be evaluated.