The problem with using 35mm in a 126 is the 35 has too many perf holes. The film will only advance one perf hole . The 2nd advance mechanism which meters the film properly is operated by the location of the perf in the film. The film rides over the pin and the motor runs. When the perf hole in the film reaches the pin, it goes through the hole, shutting off the motor (or preventing further winding with a manual camera).
Can't upload pics, only have this here Dingle Berry phone. I can fix cameras, not operate Black Berrys.
Gotta get back to work on this big azz 35mm camera which uses cassettes like a 126 but is electromechanical and operates on 110AC. We designed and built them here at work.