Purchase of used Quatro wood ct. Looking for set up advice.

Try using the procedure in the Vandersteen manual first, p.7.
https://www.vandersteen.com//media/files/Manuals/Quatro%20CT%20Manual%202018%20copy%20030621(1).pdf

If you need additional help, consider stopping by the Vandersteen web site  forums, where you will find other owners with vast experience, and Richard steps in as well to add any additional information, input, and suggestions.

Great speakers, congrats.

You should either PM John Rutan (audioconnection) here on 
Audiogon, or call him directly.
+1 on joining the Vandersteen Forum. We'd love to see you there.
Bob

Trying to reach John. Thanks you guys.

Thanks gdnrbob. I bought your 3Asigs and talked on phone bit

Oh yeah, I forgot your Agon name.
The Quatro's will be a significant upgrade. Now you will get the integrated subs as well as the carbon tweeter.
I am envious- even though I can't fit the Quatro's in my space.
You might ask Johnny if you can use your sub with the Quatro's. 
Multiple subs will allow you to negate room nodes. And, since you one one, why not use it?
If you need John Rutan's phone number, I can PM it to you.
Bob

great move. 11 bands of EQ below 120 hz is why your room is not problematic. Your ceiling ht is garbled in your post. great advice on joining the owners  forum 

Yes, please join us on the Vandy forum!
You'll get lots of great info.
B

Thanks. I checked  the Vandy forum out yesterday, didn't know it existed.
In the dark on adding the 2wq, it's packed up ready for a new home.
Can anyone comment on the Master setup process? Being that it's different from what the manual says.
D