Posted by Mike Poindexter on July 5, 2008, 11:05 pm, in reply to "Frame lightening holes"
Thanks Drew for help with the pics. Thanks to all for the insights. Reminds me of the drilled out racing hardware craze of the 60's--bicycles,cars, brake disks, you name it--drill it to save weight. Sort of neat to look back in history and figure out what was going on.