the after market grey 15 tooth gears are tight on the output shaft. Be careful, it is best to lightly sand the ID on the gear so it is not so tight. We had one gear split open as it was pushed on.
I have a new Delco yellow 41 tooth gear, in the box. Yep , they are pricey
Some people are like Slinkies... Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.