deck height limitation of LTX1042KW

Hi;



I just purchased a new Cub Cadet LTX1042KW from a local dealer and find that the max cutting height is 3.5 inches. I have a fescue lawn that I would like at 4 inches for the summer months with 4.5 as an option if it ever gets ahead of me.



The deck is level and max height is limited by a metal bump stop to protect the belts from interference if I were to make any modifications to raise it higher. The dealer and the manufacturer say I should be happy with 3.5 inches but I'm not.



So with the frame preventing raising the deck any higher, I'm thinking my only options are: taller tires (hate the additional expense and don't know which ones), lift kit (not likely and the axle mounts would not allow anyway), blades that somehow mount higher within the deck (factory is just about level with the bottom of the deck).



Any advice would be appreciated.



Thanks,

John