Please Help! I discovered a big hole in the bottom bagger tube today, at the bottom edge, big as my fist, allowing grass to shoot out the rear before going up the tube. So I would like to replace the tube but am having a hard time finding whether I can just buy that piece. Plus, it seems to be $329 as a kit. Appalling! And, the kits only show the box, frame and bags. They do not show the bagger tubes. Any ideas?