Hi Bored Engineer.
I am building a more simplified version of your tank physics for the game i am making. I am using the plugin so i can do sub-stepping for my physics.
I have got the tank working how i want except for a few small issues.
One issue that i am having is that when my vehicle comes to a stop it keeps making small little slides because the friction i am applying is reactionary.
Another issue that i am having is that when my tank lands at high speeds it will clip through the ground then bounce back up. I think this may be because i am using my suspension previous length to position the wheels and tracks.
And another issue i have is if i set my frame rate to be limited, the springs will bounce more. This means if i set it low to like 10 fps then the tank will go shooting off into space.
Do you have any ideas of what i can do to fix these issues and if you need it, what code would you like me to post a screenshot of.