Originally Posted by
tiger1964
Hmm, perhaps a clearinghouse of ideas and someone might decide worthwhile to make...
I wonder if all older pedals that could accept toe clips had the same c-to-c distance on the holes where the toe clips attach. Someone could make a casting that attached there, and incorporated a SPD-style clamp; I have quite a few pairs of Campy Superleggera pedals, road & track, that I wouldn't mind into making into SPD pedals. Same for old MKS, DuraAce, whatever.
Interesting idea. I have a couple types of attachments for SPD pedals that do the reverse: one turns the SPD pedal into a standard flat pedal, and the other type turns it into a toe-clip-and-strap setup.
An attachment that does what you suggest would require a very strong connection to the pedal in order to withstand the twisting force when releasing SPD restraints.
On the hole alignment idea, I wonder if it can be solved using a short length of aluminium bar stock with a few holes drilled at compatible positions...