I have a 60 size plane that has both rudder & elevator on pull-pull, that's an in-house bash. I also converted a Funtana 90 to use all pull-pull for the tail All the tail servos are under the hatch The kit was meant for pushrods. On the Funtana, each elevator half gets its own servo and the rudder gets a beefy one. Separate elevator servos make for some interesting mix possibilities.

I think the symetry of the rudder generally lends itself to pull-pull. While folks that really don't understand the geometry, like Dick says, won't know where to start on elevator pull-pull.

Check the Funtana set up at:

http://www.rcuniverse.com/forum/fb.asp?m=2227711