I'm the proud owner of a Super Z, 72" XR-7, flex forks, with the Kohler EFI 28hp engine. I've owned it for all of two hours. I can say that I'm glad I went with the new model verses the demo unit, so many upgrades that really do make a difference. A question for those more experienced than I. Is there a break-in procedure that should be followed? I didn't see anything listed in the owner's manual and the dealer didn't mention anything specific. Just curious. By the way, the dealer, Terry's Tool & Equipment Rental in Cumming, GA was very helpful, very courteous, very aggressive with his pricing and very fast with the delivery. I ordered it this morning, they got it from the warehouse 50 miles away, prepped it and delivered it by 3:30 pm this afternoon. Very impressive and above the call of duty, especially since I didn't make any special requests and was in no great rush to get the mower. It speaks well of their company. The mower looks fantastic. I had tried the demo this past weekend and enjoyed it very much. This new, improved version is the ticket. Might even be a speeding ticket at that!