I'm assuming to make it work I'll have to mount some sort of material into the sole that the cleat can be screwed into

I'm hoping that i'll find away to have it recessed enough to make it walkable; off the bike comfort seems like too lofty a goal. I am hoping that they'll be mildly comfortable on the bike.

What would be the best material to mount inside of the shoe that can disperse the pressure from the cleat?