Ok, that's how you tab the boot, now let me go into why your tabbing them.
This is looking at the Verducci boot from behind.
As you can see, the frames are coming off the bottom of the boot in a pronated position.
If you try to skate on the boot this way, chances are, the boot is going to pronate (boot will fall to the inside).
The Corsa's have been coming with 1 degree of pronation on each boot. (below)