Thats why I needed a system that took my frailties out of the equation, it cannot go deeper into the blade area than the skids will allow. Notice that the skids are wider than the chains. This means that when you are unsteady, and you inadvertantly pitch the blade up or down, it lifts the chain away from the blade blank, not into it.

If the chain is loose, I can see a problem. If the chain is firm, and you use a steady pressure and take it easy with sharp blades, it cuts incredibly flat surfaces. Totally surprising.

When you have been cutting your winter timbers, some cuts you will have made will have been near perfectly flat.... that how these come out.

The only time this doesn't happen is if you relax the pressure and let it run in the same place, the blade will slacken and droop a tiny bit. It you leave a millimeter or two of error wood, you can't come undone. Having to plane off a mm or two is childs play, and protects you from any stuff-ups.... of course I didn't leave a mm or two, so my TSR is a little higher than planned..... but these are experimental anyway.

I see no reason not to use it for blades smaller than the 4m set I made. Even my 8' set took me two days to do the usual way, these would take an hour or so if the jigs were already made..... too easy to ignore for a slack slob like me.