I am getting along fine bottom feeding except it is a hell of a lot slower. Even after I do it for a while I don't think it will ever be as easy and as fast as top feeding, especially on large pictures. On small things it really doesn't make much difference. I have never used a zero clearance insert though. I saw the picture you posted of the guy that made the modification to let his arm go higher..........I don't have the nerve to go grinding on my new saw.