I've got a 52 inch Toro Zero turn. I got it for about an acre of established lawn and it worked good on that. I recently moved and now have 13 acres , about 9 of it pasture and weeds and the rest is house and lawn. When I got here the pasture had a lot of tall fairly stiff stemmed weeds in it. I ran the mower on the highest setting and it would mow the pasture grass good but it would just bend the taller weeds over and then they would spring back up behind me. I'm not really wanting to buy a field mower and was wondering about blade choice. Any ideas on what blade would cut the taller stuff? Thanks Howard