None: If an Arrive & Drive package is purchased and you elect to proceed without an Ignite mechanic, you will be responsible for your own mechanical needs. No tools will be provided.
Shared Mechanic: A shared mechanic is dedicated to you and 1-3 other drivers mechanical needs: seat mounting, gear changes, set-up changes, etc. They are not responsible for getting your kart to the grid, scales, etc.
Dedicated Mechanic: A dedicated mechanic is responsible for you and only you. Everything from pushing your kart to the grid, mechanical changes and needs, getting you from the scales and anything else you will need.