I'm going to go out on a limb and say that I have never been able to achieve an adequate torque on a servo screw in balsa wood.
The screw always goes soft before I am happy.
At best it is a well known tip that if you must, it is best to soak the hole in CA glue to harden it.

I think it is fair to say that looking at some of these planes (my $200.00GSP Katana for instance)
and what you get for the money is pretty remarkable. Starting from balsa wood, as one would have had to not too many years ago, it would have taken the average builder months to build a plane, and you can bet it hurt when it crashed. (notice I said when and not if)
Buying the plane you wish to have already built for so little money, even if it needs a lot of work, seems worth it as a "good place to start".

My GSP Katana was so bent and so crooked when I got it that it took three loads of wet laundry for me to steam it straight again in two axis'. THEN the task of fixing engineering issues like sheer webbing and a ludicrous bottom access panel with springs to hold the wings on. Creating a top hatch (with the help of other RCU users), fixing shear webs, Tons of other little things I did that were not included in the instructions, but which I felt prudent to address, and STILL... 200 dollars makes this a great "starting point".

I think mfg's are responsible for delivering what is promised.
I think it is the consumers responsibility to understand that mfg's promises aren't squat.

I'm very likely going to go out and buy ANOTHER Chinese built Katana for 200 dollars and take it home and strip the covering ...Still the best deal in town for what I like to fly.

It's a jungle out there