Self-righter...??

I have a tiny problem whit my self-righter, and that is that I currently dont have any self-righter at all... :(

I am having some trouble whit the weight already, so I would really appreciate some idas for really
lightweight ways to turn a flipped featherweight...

Light HDPE/polypropylene roll bars?

Like a passive self-righter, using gravity?

I have thought about stuff like that, but I cant figure out how to design them..

You just bend some thinnish (6mm or so) UHMW strips into large diameter hoops attached to the top of the robot - the aim is to make the robot unstable (very high center of gravity) when flipped so it will usually roll back onto its wheels.

Ok. Thanks for the advise.

What i have done is made the wheels come out both sides so you don't need a self- righter