Here's (I know, a dumb one), but an honest question anyhow.. How do I easily get under the deck of my 717? change blades, clean the deck, etc. All I have ever owned in the past is gravely wb's, and I'm new to the z world. I'm sure it's something simple, but I still just don't know. Side note, one of the front tires has a puncture in it.. any good way to patch it? just a regular tire patch? thanks again.