Howdy... new to the forum...so starting off with a likely easy question. I have an Allis 190xt (cat 2) that has a 7+ft. rear wheel base. I'm looking to get a back blade or box blade for the driveway. Is 8ft. enough to keep the tires off of the driveway edges or would you go bigger?? Looking forward to being an active member. Got some Allis questions to come! 