I've been out of action for a few weeks after a pile up at the track, so I thought I'd use the down time to suss out a way of modifying Shimano SPD-SL pedals to use straps for extra security during standing starts / sprints etc.
The modification is pretty straightforward to do and doesn't involve altering the pedals themselves in any way so its reversible. It is for SPD-SL pedals - mods for other types eg SPD-Rs have been documented elsewhere.
Photos of how to do this are posted here:
http://www.badbean.com/cyclingstuff/spd_straps.htm
mickster