Need a chute blocker for my new Gravely 460 and would like something foot operated or at least one where I can keep both hands on the sticks at all times. Both open straight up all the way so nothing sticks out further than the deck the way it looks. The Power Chute I believe can be stopped at different positions and has air holes in it but costs more. The Grass Flap maybe cheaper/easier to repair later, no air holes, and is either open or closed which is probably how I would use it 97% of the time anyway. Grass Flap $240.00 include shipping http://grassflap.com/ Power Chute $329.00 Plus S&H http://powerchutedesign.com/ Anyone have any experience with both or know of another brand I may not be aware of?