I am making the switch for 2004 from cutting to fertilization. I'll be getting my applicators license over the winter. My 185 cutting acounts have been spoken for at the end of this season as well as most of my equipment. This allows me to spend a decent amount of money on fert equipment. I have been interested in the Ride On Ultra and it sounds like most of the previous issues with the unit have been addressed, crosses fingers. In Michigan where I work, there are not to many fences. If I am able to do effective fert and weed control with the ride on, do I really need to purchase a spray tank? I have the finances to get a cab over truck with a big spray tank. The spray tank also takes up space and I would almost rather spend some money on a $7000 z-spray aerator instead. Any thoughts on going this route?