I'm shopping for a new tractor, and the B2650 is one that I'm considering. When I was at the dealership last week, the sales guy said you can't have a MMM with R4 tires. Anybody know why? I see a bunch of pictures on the web with this combination, and nothing on the build your own kubota website that suggests you can't have R4 tires with a mower deck. The sales guy seemed pretty confident, though. Is he mistaken? I'm going to be doing a lot of work in the woods, and I'm not sure turf tires will be up to that task.