I ran my X540 and 47" blower last year without chains as a test. It does have HDAPs and I had 4 suitcase weights. I did not like the way it handled my short paved driveway that has a slit grade. The rear end felt way too light, even with diff lock I would spin often and go no where it seemed. Happened mainly when in reverse backing up the slight grade. So I added the 50# wheel weights, that helped quite a bit. This year I will put the chains on and it will be perfect. If I were you, I'd lower the air pressure in the rear turfs and try it out if chains are out of the question. Then you could always load your tires and I bet with that much weight you would be happy (until you got on ice). If that dont work, trade in the X700 for an X728.