RE: Model Tech Extra question....
Re: Stab
The problem is not so much the stiffness of the stab ( I do this as well with all of my planes too... ) but rather the material into which the CA hinges goes into is too soft. The CA hinge holds just fine, but the surrounding ( unwicked ) material tends to pull out.
I'd suggest that you just add another smaller CA hinge or two to solve the problem.
Adding the support would be a nice option too.