Andy,
You might want to first check whether the counter spring on the Centennial stand is strong enough to support the weight of a 11x14 Commercial Deardorff- those things are monsters. I have a Century 10A on the matching stand and it barely holds the camera/lens at higher positions. It might be frustrating with your much heavier camera.

Sounds like you're assembling quite a portrait setup. Having a studio space must be a blast too!

Best,
Daniel