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I did the same on the back side of the foot pedal itself.
Not shown in the photo is another change I made to the assembly that I bought from Dave Thatcher. He used a rivet in the sleeve he used to hold the foot pedal in place. I drilled this hole clean through to the other side so I could hold the sleeve in place with a cotter pin. This way I could easily remove the sleeve if there was ever a need to without having to drill a rivet out.