With this system, the tree is completely blinded.  The system computes the difference in dial-ins and holds the top yellow on for the difference in the dial-ins on the lane of the faster car.  The tree then  comes down as normal.  This is only used in the electronic type classes.  If you are using a cross-over box, you still put in both dial-ins just like usual.  The only difference is you let go on YOUR side of the tree.  If you are leaving first, there is no more difference than before.  The advantage of Crosstalk is you leave on your side of the tree, no matter what.  The only disadvantage is if you do not crossover and use a single lane delay box.  In that case, you would need to add the difference in dial-ins to your delay.