"The Bicycle Bubble Machine" Different Pulley (+Add-on for large Pulley)

My ribbon was sliding over the Gear Pulleys of "The Bicycle Bubble machine" so I decided to try out something different and edited the small pulley and made an add-on that clips right on the large pulley.
I hope you like it.

I also put the blender-files up so if someone wants to change something else

If anyone wants the Add-on with the sides and the double Spikes like in the picture just message me because it doesn´t upload the file (The normal download might be working now...)