I wondered if there is a tool (short of a large press), or combination of, to assist me in bending/straightening my lawn mower blades? I continually manage to hit roots and stumps with my lawn tractor's mow blades, badly twisting the oddly pre-configured blades. I generally resort to sledge and tree forks, but can never match the original configuration with such crude means. Any suggestions/products to help put things back in shape? Appreciate it!