Stove Knob Insert

I ordered the following stainless knobs from Amazon as a replacement for my GE Cook Top plastic knobs. Unfortunately they had a spline down the insert and did not fit on the posts. I created these inserts and now they work like a charm.

I am including the Tinkercad file in case you would like to mix it for another knob/cook top combination.

Amazon:
https://www.amazon.com/gp/product/B004H3XPJ4/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Tinkercad:
This thing was made with Tinkercad.