I'm looking at a B7800 with low hours and R4s. I need to mow about 2.5 acres of lawn which I currently do with my BX with turf tires. Anyone have a large B series with R4s that mows? I've read differing opinions, but am concerned the R4s will tear up my lawn. I really wanted turfs but its near impossible finding a used B with them. Would appreciate your opinions!