Peeps are great for old eyes but I'm thinking I need something more, will know after I see the eye doc. They'll look cool on your rifle, shooting better is a nice benefit too. .
I'm all done with standard buckhorns too, I'm afraid. I have a good drill press but would hesitate to do something like that, good gunsmith worth waiting for. Have you checked Lyman moulds? I thought I saw something there once but I don't know what you're looking for.
I've heard things about fixes for Marlin feeding issues, seems I've read about it around here somewhere. Kinda discouraging when the factory and their go-to shop can't fix it. I bet someone around here can help.