I have owned several commercial wb's and ztr's. I attempted to change the blades and spindles on my 72" Lazer Z for the first time last week. I needed to change the spindles because they were starting to wabble, luckily the parts were still under warranty. When I got the nuts loose on the top of each blade bolt I expected the bolts to drop down out of the spindles like they do on most ztr's. and wb's. Instead, they looked like they were part of the spindle itself. I look at the new spindles in the box and I can't figure it out. I peck on the top of the bolt with a hammer with no luck. I call the dealer and they have never changed any spindles on this mower so they are completely clueless as to what I am describing. I decided to pay the dealer to mess with it. One week later they have mushroomed out the top of the bolts from beating on it and ruined the bolts and never did get them out of the spindles. Is this normal when changing spindles on a Lazer Z? I've changed a blue million of them and never seen this set up. I couldn't even change the blades. This mower came with a golf course I took over but I don't think I'll buy another if I have to take it to the shop to change blades. If a company is going to put sealed bearings on their mowers then they really should be great bearings.