I recently came into possession of a very nice Craftsman LT 1000 Model #917.272463. My issue is with the adjustment of the deck height. I can get it to go very low but on the highest setting I can get, it stays at 3 on the gauge. At it's highest setting, the bottom of the deck is 3" off the ground. My adjustment lever has only two positions. I do have an adjustment knob which I can use but there is no way I'm ever going to make to the high setting on the gauge. It seems as if even if I could make up the difference between setting #3 and "high," the shroud would hit the bottom of the mower. Any thoughts would be appreciated. Thanks in advance.