Yesterday I went to raise the deck slightly on my Quick36 about a half inch. I actually bought the unit in December, put the height at 3.5", and that was the last time I did any adjustments (5 months ago). I thought I was going to have to blast the unit with dynamite in order to get the front spindles out. I beat them and beat them and beat them. I was actually at a customers house and eventually gave up and ran the SuperZ across their yard. When I got home, that evening I hit the spindle shaft so hard, it popped the upper bearings out but still wouldn't allow the shaft to go through. Then a small light went off in my head. I pulled out my 4" hand grinder and went to work on the top of the spindle shaft. I had to do some serious grinding to the upper inch of that shaft trying to shape it almost like a cone. After trying, grinding, trying again, grinding again, etc., it finally slid on through. Is this a normal thing with walk-behinds? Now that I know what to expect, I'll be ready if it happens again.