This thing without FunkyTrees cannot fly no matter what, due the insane instability that have, but i made a specialized input control system that emulates how the real X-29 is, this version have the X-29A tail shape, but can fly at high AoA as the X-29B. the roll authority is lost around 45-50 degrees, but the airframe itself can reach over 60 degrees, and maximun absolute of 86 (the real X-29B can reach 66 deg)

the weight, fuel time and max speed is adjusted like the real one (13800lb cln weight, 17800 with fuel, and 956kt at FL330) the pitch performance is exagerated, but if you want it more realistic adjust the canards pitch/2 to pitch/3, and angleOfAttack from 40 to 30

Internal Data: the plane has a gyroscope, the only function is to reduce the involuntary roll at cruising

Alternative variant with conventional controls: https://www.simpleplanes.com/a/3Ugyl0/X-29-Without-FLCS