Has anyone ever retooled (drilled and tapped) their crank arm to move a pedal up? My right leg is 17mm shorter than my left due to a car/pedestrian accident that left me with 2 broken legs nearly 40 years ago. All of my street shoes are altered by having a lift added to the bottom of the shoe, but getting custom cycling shoes would cost $12-1500. Not an option! I am considering a cross Canada tour next year, and wanted to be able to clip in for greater efficiency, than going with regular shoes. Thoughts? Thank you.