Webber Grill Valve pin

I salvaged a webber sprit 2 grill with a broken off knob. I couldn't justify spending the money on a whole new valve assembly so I made an attempt at printing a new valve stem. It does require a bit of post processing to grind down a flat spot. Please someone remix this to have an accurate flat spot so the knob turns properly. I just hit it with a dremel and used the other pin as a guide.

Knob : https://www.thingiverse.com/thing:5223180