Dennis, when cutting at 3" on uneven ground, the skids do not hold up each corner very well and you can cut over 1" lower from one pass to the next. With the wheels out there and set to 1/4-1/2" off the ground, it makes a much more even cut from one pas to the next. I run a 48" deck on my 106 because of the fast 2nd gear. Like you, 2nd gear is way to fast and 1st gear is kind of slow for mowing so I have plenty of power to pull the extra cutting width and it does take less time. I mow about 1.5 acres each week and cut another 1/4 acre every 2-3 weeks. It takes me about 2 1/4 hours normal and 2 1/2+ the other week without the trimming. I do not have many trees but I have the garden, shed, garage, and house to go around. It takes less than 2 hours when the 129 and 50" deck was running good. Thank you brother-in-law for siezing the rings on that unit.