Yeah Blah Blah Blah.. I Know.. But using the philosophy "if you can't beat them, join them"..
I had the 70's Slingo pedal with a dodgy goal post, The speed king with the base plate pivot holes so elongated beyond repair that I decided to do this..
Happy with the outcome.. it works like a breeze.. absolutely no squeaks & very smooth action.. In fact I prefer the action to all of the later pedals that I have.
No mod to the Luddy post, just a service and paint job.. Foot plate mod so it attaches as usual, made the connecter piece from a piece of shelf racking, filed in a slot to take the spring steel clip and the nylon bits are spacers. made from some tap washers..
Cheers