I made my final decisions on which sights I am going to use for both the air cooled, and water cooled versions of my convertible dress up stock.
Last night I made the rear ladder sight bracket. I realized that I could mill off the triangle on the right side, and just keep the triangle on the left side (like on a real Browning 1919a4 or 1917) and still be able to secure the sight bracket without it having any kind of looseness or "rock" at all. All that is left to do with this sight bracket is to drill and tap the sight riser plate for the ladder sight's spring, and then to drill the sight protector "ears" and install a small diameter bolt through them and the ladder sight so I can effect windage. The 1917 Enfield rifle ladder sight I am using did not have the ability for windage. It was a flip up type only. So I tapped its pin hole where it flipped up, so it is threaded. The small diameter bolt I will put through it will enable me to turn the bolt to make the ladder sight travel left or right on the bolt, thus effecting windage. I left the sight protective "ears" a little higher than I needed until I mount the ladder sight's spring and the sight itself. Then I may be able to trim the ears down some maybe an 1/8th inch or so. So when you look at it now, the protective ears may look a little higher than they will eventually be. When I made them, I figured better to have them too high and be able to trim them after I finished mounting the sight and its spring, than to have made them too short. You can always trim metal, but it is hard to add when you have cut off.