Pull-Pull Mad StabEdit
There are several ways to do a pull-pull Mad stab; but why not emulate the guy that started it all: Benoit Paysant-Le Roux (AKA BPLR).
Take a look at the photos to see how the master set up his Madslide. Benoit used standard pull-pull hardware... commonly used in large motorized aerobatic planes. You can learn more about the Madslide at the Jivaro Models website.
For an ultralight build (sub 20oz): A Du-Bro Micro Pull-Pull System (part number #846) works quite well with an external tailboom mounting of the elevator servo.