used a rear coaster brake wheel on the front and ran a cable to the sprocket to yank it and stop? I've been kicking around the idea and haven't figured out why it won't work. (i know i have to attach the arm) I've come to realize that about 96% of my original ideas aren't original so if anyone has done this let me know.....or if anyone knows why it won't work let me know that also.....thanks