By design, most delta wing platforms require every bit of the eleven moments to control and pitch stabilize the aircraft.
I've had the SAAB J35 Draken since 2007, and while the control mixes are complicated. They do justice for the arframe, both in performance and with scale-like functionality!
Like your jet, the Draken has both inboard dedicated primary elevators, and outboard elevons. Drop me a PM IF you like, we can chat more on the subject.
The Draken will be present at the SC-Tiger Meet this weekend. Will not be flown there due to the tail wheel door structure being too low, and likely damaged on grass.
Take care,
Franko