Yes it does. It turns by differential speed of the two motors. The front wheel slides along on grass. It doesn't make a sharp turn but works pretty well on the fairway. We don't recommend turning on concrete. It wears out the front tire quickly.
The geometry of the cart doesn't change. So if your cart is prone to tip then adding the eWheels will do the same. We're working on a Wheelie bar as an accessory for those who play on a very hilly course.
Don't see the answer to your question? Ask the project creator directly.