Its not just a matter of reversing the direction of the belts because the threads on the pulley shafts are reversed as well, which means the nuts are reversed too. So, you reverse the direction of the belt which causes the blades from the L to spin correctly on the R, or vica-versa, but the weight of the blades spinning in the opposite direction of the nuts holding them on, will work to loosen the nuts. What a mess that will make if the nuts come off at speed, and then the blades as well. I once questioned it when ordered new blades for my L59 that were R59 (opposite spin). Setting on a shelf in one of the barns is a perfectly good, never used set of blades that I cannot ever use. I ended up buying another correct set after loosing my receipt and the counter guy that sold them to me wasn't there when I tried to return the non-stock ordered set of blades. Reversing direction, flipping blades? Nope, will not work.