[Anupam Goli]

Before you pursue an entirely new drivetrain, let's break down your current one. What setup were you using? (Gearboxes, number of wheels, which wheels, wide configuration or long configuration, etc). Could you also provide us some video of the robot driving? There's more you need to look at before making a decision such as moving towards an omnidirectional drivetrain. The kit drivetrain is one of the easiest and most powerful drivetrains out there.