First year out and I could really use some help. I found a company (CUE) in Pgh that sells these urethane cutting edges and I'm going to order one to use primarily for my residential customers with omnistone and paver driveways. I just have a few questions for the experts: My equipment- 2000 3/4 Chev w/7.5 Meyer steel plow. I only have a few parking lots (all approx 40,000 sq. ft) and a hand full of residential driveways, most with omnistone or other type pavers. Qeustions: What size urethane should I order? I know I need 90" lenght, but what about width and thickness? (I'd like to get it wide enough to be able to center drill it and use both sides). Probably the real questions is how much should the urethane extend below the moldboard at the bottom of the the plow? If I know that I can probablyl do the math. And would you recommend that I off-center drill it so I'll have two different size cutting edges extending below the bottom of the moldboard (maybe a 1" for hard packed snow/ice and 2" for softer stuff)? And do I need to put my steel runners back on to support the urethane? I will truly appreciate any help. Thanx everyone.