Making a Gear Cutter Arbor

I had some gear cutters for cutting some 16DP gears.  It was another break I needed away from placing a lot of stupid gears on a piece of paper to get them laid out.  I did not have a way to use them.  So, here is my stab at cutting an arbor down to size, drilling, and tapping the hole.

Now, I can potentially grab a slab of aluminum round large enough for the gear, true it up, then throw it on my rotary table and make custom gears (127 teeth and 100 tooth gears will be needed for a perfect metric thread base).