I noticed in the manual for my turf tracer that the blade bolt should be torqed to 115 to 120 ft pounds. How critical is it to get that close. I use an impact wrench that I think delivers 230 ft pounds max. torqe and really cant tell how much torqe is being delivered. How much is to much, and what damage could happen from getting to tight? Should I purchase a torqe wrench? Thanks for any help.