This video is a add on to the Instructions of the 3D Printed Bumper Design i provide on Cults3d.com.
The Bumper is avaiable via this Link: https://cults3d.com/en/3d-model/game/pinball-bumper
Other Pinball Parts are avaiable here: https://cults3d.com/en/users/wilfriedfabian/3d-models