Rubber on the playfield support

[pinball god]

Pinball terminology is not one of my strong suits but I would like to know what is the purpose of the rubber ring that I sometimes see dangling from the support arm to keep the playfield up or at a 45 degree or so angle. Hope you guys know what I'm talking about.

If you know how to use it would be great to share the knowledge. I can only see that it would tension the arm against a loop clip and maybe stop it from falling???

[48]

Thought it may be to stop the arm scratching or rattling on the side of the cabinet??   

[ddstoys]

I think its to loop over the bracket the arm sits on to stop it moving around in transit

[johnwartjr]

Holds the rod down during shipping. Slides over the prop rod and the hook it sits in when lowered.

[pinball god]

Jeez I would have thought it was used for more than just that.

By the way is there any way to stabilize the support when the playfield is up. I find it very unstable and a worry it will slip and the pf comes crashing down.

[ddstoys]

And it hurts when it does