TS-2 doesn't require a dishing tool. If properly calibrated, the rim will always be dished properly when done.

To align the TS-2, loosen the rod binders at each end of the preload spring. The spring takes out the the tolerances from the thread. Find the middle of the rod, now bring the arms together and center upon that spot. You can use a plumb bob or carpenter's square. Once squared away, tighten the binders. Now you can focus on the caliper arm to check if it's square. Draw a line from the midpoint to the closed caliper, should intersect if aligned. If not there's a shaft and nut(s) at the base to adjust it laterally.

Note, if you have one of the old TS stands w/o the spring, go buy a spring from home depot and add it in between those binders. Save a lot of cursing.