Has anyone owned or used the Lawn Striper? Made for 21" mowers. I run my buisness off of 21" because of smaller lots, and get horrible stripes with them. Would you suggest buying it? Anyone own them or ever use them? Here is a video of them in use.... http://www.youtube.com/watch?v=lWJCHlOldic&feature=related Tell me what you think...should I order it or nah? Thanks!