planes like sig king kobra (.60 size sport pattern)come me with exactly the same hardware for aileron control that the lt40. When correctly fit there is no problem, I maintain that if your setup work freely without excessive frictions at low speed, the setup will work great at hig speed, the load will only be higer and the servo can go against it.
On a plane like the LT40 i don't think you can reach speed able to overload a standard cheap servo (except during outrageaous dive) or bend piano wires.
your servo should have a problem.
that's my opinion