Hi, I have a couple of things: *I have a Exmark 60, is there any tricks that anyone uses to change the blades. Sometimes they can get pretty tight and be a real pain to get off. *I have a vac on the 60 and I always get a build up of grass in the top part where the rotor blades spin. When it does that it makes it harder to run nice and smooth.I can only reach in so far to get it scrapped or do you have to take it all apart. Anyone ever use some kind of spray (cooking) on the shut to not have the grass cling to it? Any ideas would help! Thanks!