Read the last post before you read this! I just looked at today’s list of searches (only three so far today!) and the expression in the title was listed. If you copy it into Google, one of the pictures you find on the first page of a Google image search is of a Ridgeback with butterflies! They look good (and get a good write-up on this guy’s website). You also get a link to this site where a chap in North America has refitted (and revitalised his cycling by the sounds of it) with a set of butterflies.