Doesn't the carradice have the metal tag on it? If your superflash has the clip it should hold it nicely. Maybe with a judicious piece of duct tape to tighten it up a bit.
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(Life is too short to play crappy guitars) 2006 Raleigh Cadent 3.0, 1977 Schwinn Volare, 2010 Windsor tourist. ( I didn't fall , I attacked the floor)