Lames for slashing

SFBI has a handle with replacement blades. I'd buy the handle but don't think I would ever go through 250 blades in my lifetime Regular double edge blades come in smaller quantities.

I have tried both the Matfer and regular razor blades. Being possessed of 10 thumbs, I struggle with the docking thing. I have taken a radical step. I just spent $20 at the local hardware store for an Exacto Knife kit. They are like scalpels, with interchangeable blades. I think the one that will work best for me is the one that is rounded from front to back. My biggest problem is that I always manage to get either the front or back "point" of the lame/blade stuck in my loaf. I am hoping that a rounded blade will solve this problem.