Just found this new sulky for the Hustler walk behind: http://hustlerturfequipment.com/Pro...Cont/TSHydro/TSHydroAttach/TSHydroAttach.html Has anyone here used one of these? Would it fit any walk behind mower? Do they flip out of the way if they aren't wanted in certain situations? I have been using Proslides for 9 years, and love them, but have always thought that if someone came up with this type of sulky, I'd buy one. It must stripe great, parts replacement would be negligible because parts roll instead of drag, and it seems it would be much safer too!