Anyone run double blades on a 21? i was thinking a guy could use a single 21" highlift blade and add like a 16" gator blade with the same hole size. This might help cut up some clippings when side discharghing or even mulching. Let me know if you have done or tried this? i would think this would give a nice cut with the high lift and leave small pieces with the teeth on the gator blade? Anyone? Beuller?