I've been using this uncomfortable, hard to use crank for several years simply out of laziness., but I finally got an idea for a simple solution to fix it.
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Step 1: Find a Bike and Take It apart!
But it is not going to waste. The first thing to be recycled is one of the crank arms. It fits almost perfectly onto the height adjustment shaft, It's made of nice tough steel, and it's shiny! Who could ask for more?