Drives are often not perfectly aligned when mounted. This can be due to inevitable slight variations in shrinkage when cooling after the Rotomolding process.
First check your fins and see if they are both within 2 or 3 degrees of straight up when holding your Drive upside down, pedals together (make sure the pedal adjustments are in identical holes). This checks to see if your Drive has a tendency to ground on one side prematurely. If they are leaning to one side or split significantly, they can be realigned by loosening and tightening opposing nuts at the cable ends. If they are close, better to leave it alone though -- correct cable tension is more important than perfect alignment.
If you're smacking the boat with your Drive or fin(s), you have the pedals adjusted too close. Go to the next pedal position. Your legs should be able to fully extend without normally hitting anything with the Drive.
If you're still having problems see your dealer.
