There's a switch on the front left of the table to switch between the far left pin and the one in the middle of the table.
We use a 5x10 spoilboard off the center pin, so the rake can push our sheets off the table. If you use the left pin and the whole 12', you can't use the rake.
In Alphacam, you can make a few changes to the post. There should be a button witha big M, or you can access it from the menu.
There should be a number like 25.5512 or something like that in the post, for the center pin. Change it to 0 to use the entire 12'.