i think it's probably that you don't have enough gap between the stab and the control surfaces. it looks like you have almost no gap in there. if you take off the control rods and try to move the surfaces by hand, i assume that it's also very tight and the wood gets in the way. as someone said before, just deflect the control surfaces while you're applying the CA. about 3 drops a side is good but up to 4. just let the CA wick into the hinge.

but beautiful otherwise!