My Father in law gave me a 1997 36" Giant Mow walk behind for our 3/4 acre home. He just brought it to town today and we took it tothe service shope for a tune up. It's in great condition, I bet it has less than 75 hours. I want a grass catcher for it and was wondeinring where to buy (I've seen places online but didn't know if there is a type of cathcer and place people buy from). And also, do I get a 3.4 or 4.4 catcher? Lastly, does it help to have mulching blades on them or are the three blades perfectly fine?