Tytus,
Again... I am REALLY impressed with the things you do with legos. Keep it up! I wish I had more HS students on my team as enthusiastic about design as you are.
The coax-swerve is a concept I've put a lot of thought into. It's cool to see your take on it. You're inspiring others!
Eagerly Awaiting the next Gerrish-creation,
John