Help with Starstruck

So My team has a competition in two weeks, and we have a drive all done and programmed but we are having a problem with our launcher. We originally started with a choo choo design but went with a slip gear. So does anyone have photos, videos or links to slip gear designs that may be easy to replicate for our starstruck launcher?

I would start here:

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Here is some videos of slip gear launchers. Team 5327c

I don’t believe that either of those use slip gears.
This one shows the gearing quite well.