Might want to try concave door hump kit, replacing 1st six helicals with 4 steep pitched helicals, feed chain speed up pulley, and on 500 headers 19tooth drive and 70 driven auger sprokets. Started at 12:30 today and cut 63 acres of Tennessee hill ground. Wish I had a 530 instead of 525 only for capacity and speed on a 97 R62. Second gear, hydro wide open, RWA on is more tolerable on the ears since third gear WHINES too much.