Testing my little tractor/mower, after making some modifications to the grass discharge system on Sunday. Problem was, it was designed to collect, in a massive hopper on the back, which I never use because grass in the UK is so moist. It would back up in the duct, and eventually jam the deck up. Without the hopper, it blew out of a 9" x 9" hole at the rear and up into the air, went everywhere. Sunday, I fabricated a SS section of duct, so the cuttings went out the back of the deck, then got directed down to the ground. The test, today, seems to suggest it works quite well.