First off, that looks awesome! Thank you for sharing your use-cases and for the kind words. Love seeing how the plugin ends up being used in other cool projects.
Regarding the cables going nuts in the mech, I bet it’s due to them being simulated in world-space and having a bit too much happen around them. Simulating them in component-space should resolve this. Do you already have access to the GitHub repo?
I implemented component-space simulation for another project, but it was done in a hurry due to deadlines so it needs further testing. If you are up for it, I’d be happy to have you test it out in the mech. Let me know and I’ll get things setup.