OK Bro you asked. While the Patriot and GP F-15 kits are still in their cozy boxes. I have had two Kangke F-20s one with a .46FX the other with my trusty MVVS .45. Both are excellent flyers. Tho the land a little fast for my taste. They also needed a tad of the L word in the back and the battery under the rudder to get balanced. Also they don't fly slow! Keep the speed up for life.[8D] The SA F-20 flew once with the Czeck motor untill I screwd up trying to fly slow[:@] and turn at the same time, bad idea. The plans for the SA didn't give any location for radio or batt location and the cowel was a messy fit. Also the rudder linkage was a little hinky to get located right and had a tendancy to bind. The SA also needed way more L word in the tailcone to balance[:'(]. Funny thing I went to take a few pics of the F-16 and the batteries in the camera were dead. So you will need to wait till the morning.
The CBM needs around 7oz[X(] in the tail. I am casting it tonight.