I am building a simple tabletop pinball machine and wondered what angles the flippers should be able to move through. I have 3D printed a flipper alignment tool (https://www.thingiverse.com/thing:1644154) and by doing a bit of trigonometry it looks to be aligning the flippers 35º downwards - working from a horizontal line across the playfield.

Can I assume that they should also move 35º above horizontal, giving a 70º range of motion?

I have done numerous Google searches but can't seem to find any information, other than people trying to build virtual pinball with Box2D and Unity engines.