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 ni