Whats the min thickness for the base material? I have some 8mm mdf, and i don't want to lose too much depth off my blade.
I've worked out how to make the runner (for readers of my previous post on the matter). I will plane a piece to a thicnkess that matches width of slots, and the cut strips with tracksaw. Seems safest and most accurate. I might even laminate the mdf to make double thich and cut strips from that, although i see hardwood is indeed almost always recommended for runners?