Back on topic, however; I was wondering if you could comment on a change in design I've made halfway through this:

I've decided that geared front focus is a bit of a waste. I've decided to have a manually sliding front. Similar in principle to the Chamonix-styled rip off design, but infinitely positionable via a slide (not pre drilled holes). I have an idea on how to lock this off as well.

I figured that I've never used both front and rear to focus, and being 8x10 the draw will be possibly too long to reach the front with long FL lenses. So, why not have a system where you roughly position the front and use geared focus on the rear?

Your thoughts?