Bicycle spoke nipple insertion tool

I enjoy building bike wheels, and I enjoy nice tools. I also enjoy 3D printing and making nice tools with the 3D printer. This is one of those cases. In the photo on the top is a [$20 spoke nipple insertion tool](http://www.bikehubstore.com/product-p/mulfing.htm), _(I'm not affiliated with BHS but am a very happy customer)_ it's a really nice piece of steel with a taper on the pointy end that creates a friction fit when inserted in the top of a spoke nipple, which allows you to pass the spoke nipple through the rim and thread it onto the spoke. I've used other spokes in the past, but you have to take time to thread the spoke nipple onto the spare spoke, and then thread it off, and that takes time. Using the tapered end and the friction fit is much, much faster.

I had an idea of how I could create my own version - yes, even though I already bought the fancy one - that anyone could 3D print. I searched until I found a screwdriver handle that I liked - see the sources for a _fantastic_