Senior,
I do already have an old .250-3000 takedown on which I wanted to use a tang peep. Couldn't lay hands on a vintage model, so I bought the Marbles' sight. I had to call the company to get an extra-short stem (which they supplied free of charge and immediately, along with a pair of extra mounting screws!). The best I could do was about 8 inches high at 100 yards. I eventually sold the sight, because I didn't want to go to the trouble of having someone make me a taller replacement front blade. It's the type of front sight where there is a boss left on the barrel to function as a ramp. The boss is slit lengthwise, and the sight blade is stood up in the groove and secured with a screw. I'm sure you're familiar with them. If I had a dovetailed sight, life would have been easy!
Luckily, the rifle shoots accurately with the sporting rear sight: I once fired a 10-shot group which was about 2.5 inches at 100 yards. And with the scope? My best 3-shot groups with 100-grain hunting loads have been about 3/4 inch at 100 yards. Next year I plan to use it as my primary deer rifle, which I would have done this year, but for the fact that I had no ammo, couldn't find primers locally, and was too much of a cheapskate to pay thirty bucks for a box of factory fodder when I have lots of components! So I used my .280 bolt gun. Where's the fun in that, I ask you? (LOL)