Here is my setup: 36" Metro w/ 2 spacers above, 2 below....3 spacers below front casters, axel pos D. I am running OEM blades and they are swapped out for sharp ones every 6 to 8 hours. All grease fitting are pumped weekly and the deck is scraped daily. Now for the 2 problems. For one, my right drive wheel belt keeps working itself off of the front pulley which makes the pistol grip tight and almost completely unresponsive. My second problem is with my cut. For no apparent reason I am seeing a small area of uncut grass about an inch wide right between the blades. It does this periodically and it does it with all three sets of blades I have. It started 2 days ago in the middle of a yard and I am stumped. What do you think Terry?