[tauntdesigns]

Here's some info on the X3 that I copied from Grizzly's site:

# T-Slots: 3@ 1 11/16" centers, 3/8" studs

# Max. distance spindle to table: 14 3/4"
# Table size: 6 1/4" x 21 5/8"

# Table travel (longitudinal): 15 7/8"
# Table travel (cross): 5 3/4"
# Headstock travel: 14 7/8"

I'm not sure what you're asking... exactly?

If your wondering if the hold down holes (or slot) on the indexer will bolt down in the t-slots and still leave the workpiece (part) in the working area of the machine..........?
You could make an adapter plate (piece of alum) to mount the indexer to and then clamp the plate to the machine adjusting it to the working area of the machine.