After endless experiments to improve on my original (heavy) main-stand aid (enter 'mousetrap' in search to see my original entry), I have discovered a method that does not include any machining nor any welding. I now use a 10" (300mm) long piece of aluminium 2" (50.8mm)square box section, slip it over the pedal and hey presto! Easy. Total cost £11.99 including p&p. The square shape makes for a sure foothold and it is light enough to carry under the seat. Now why didn't I think of it before now?