Which servos?
Stuart,
Vampire, the designer of the Facet will tell you which ones. Give him a PM, very nice guy and very helpful.
I'm also building a Facet 1200 with a Wren 54. Your plans call out 70 oz servos on a couple of control surfaces. I'm thinking of using the servos I have on hand, some Fut-9202s and a couple of Hitec 5625s. I'm also going to ask Vampire what he thinks.
Later,
Jerry