The Vandy speakers come with adjustable stands so you can tilt them back to get the tweeter's output to align with your ears. The further away from the speakers you sit, the less back-tilt that is required.
As you are adjusting the tilt-back, tape a string with a small weight to the rear of the top end-cap. With the weighted string hanging down the rear of the speaker, measure the distance between the string and the body of the speaker at a specific point. When you set up the second speaker, repeat the procedure, but adjust the tilt so the string-to-speaker distance is identical to speaker #1 (at the same relative point on speaker #2).
You may find that experimenting a bit with the tilt-back is necessary, to get the speaker's dispersion pattern to "lock in" for the best sonic balance and soundstaging.
If you would like more detail on this process, drop me a personal E-mail and I'll copy the pertinent part of the user's manual and send it to you. You can also buy a complete replacement manual for about $5 buy calling or writing Vandersteen's office in Hanford, CA. If you call, you will probably talk with Richard's daughter, who acts as the receptionist and chief phone-answerer (she's very nice).