From time to time, Uncle Tony will give you an additional gift box with weapons and gadgets.
Test your machine first in quick matches. You'll get the feel of what you can do with them and decide if they are worth of your time.
Before you start demolishing your machine rethink your design. Having parameters like damage per second and health high is great but the shape of vehicle influences performance as well.
Always use your boosts they'll help you in the long run.
Every fight, bet and promotion affects your rating so take care with each three options accordingly.