Hi All, I've taken reciept, along with a large box of stuff, of a smaller box containing five strange little sturmey archer shifters. I think they clamp on the top tube. They have a face plate that is shaped like a slice of pie (mmmmm... pie) which is marked to indicate "Low", "N" and "High", and the shifter is a little chrome plated doodad sticking out the top. Anybody know what's up with these? Regards, and thanks, -Chuck