Pogo Stick owners manual?

Our family was reminiscing about stilts and pogo sticks that we over-used as kids, but Martha, as expected, did us one better. Not only does she still have her pogo stick from the old days, but she has the spare parts envelope with instructions that came with it! My attitude would have been, if you can't figure out what to do with the cotter pin, or had to read instructions (for goodness sake) to use the Pogo, you were out of luck. No healthful exersise for you!