Yoda, I have an idea for you on that. Pretty much, by accident, I discovered that a small "dot" of 3M Dual Lock material solved this problem. I'll explain...rather than having to drill and tap a hole to screw in a bolt, I decided to try some Dual Lock. If you're not familiar with it, it's an industrial-strength hook & hook material made by 3M. I stuck a dot of it on the underside of the peg tip and also stuck a small rubber tab on another dot of Dual Lock and pressed them together. This resulted in something that looked akin to the bolt with acorn nut approach but was a rubber tab instead. Unfortunately, the rubber tab side fell off and that left me with just the small dot of Dual Lock on the peg. To my surprise, that was all I needed to be able to open and close the peg with my shoe. Apparently, the hook surface alone of Dual Lock provides enough friction to enable opening and closing with just the top of your shoe. Sometimes, our best ideas are the result of an accident and that's exactly what happened here.