Hello Ragz!!
I have checked with Don from planesplus and the wing area is 889.92sq inches on the 24CA Extra.

I am glad to see that you have landed safety your bird!
Damn....13lbs with 890sqin area give you 208oz/6.18sqft=33oz/sqft ratio and really too heavy man! You will have to land at full speed!!!! Please remove that twin servos for the elevator and put only one!
I am gonna put the rudder+elevator servos over the wing tube instead of putting them in the tail and adding dead weight in the nose.

CA model suggest 10lbs on the web site. Based on this, we would have 160oz/6.18=25.9oz/sqft, that's correct for aerobatic performance.

11.6lbs give you 185.6oz/6.18=30oz/sqft and my opinion, that's the maximum acceptable limit with the right CG on that plane.

What engine mount did you use?
I plan to put an MVVS1.6 but to save the maximum weight on it by:
1) replace the existing landing gear by carbon fiber TNT
2) micro servo for throttle
3) 10oz tank
4) light Robart wheels
5) Light engine mount
6) I am gonna put many holes (1'' diameter) on the wings and stab to save weight.
7) put all servos in the middle of the fuse if required
8) Only one servo for the elevator
8) put helium in the wheels...

Keeps contact guy!
Scou