I want to build a tapering jig. Don't need one right now, but it's been on my to do list for years. ( I know how to taper legs on the jointer.) Looking a you tubes, books, and magazines, all ride on the right side of the blade. None on the left. By riding on right side of the blade, my left arm is over the blade. Not exactly smart, IMHO. I'm really attached to my left arm. So I'm thinking about building mine to ride in left miter slot. Is there some unknown to me reason, it can't ride in left miter slot?