Cool hinge cutting tool !!
"You can;t fly full throtle with a SPAD because they will flex being made outta coro and all!!!"
Absolute Rubish.
A SPAD built to go fast will have no problems with flex, from memory the corodust is good for 90mph with no flex.
the problem is a plane (coro or balsa) designed for slow flight and hovering will not like zooming around the sky at balistic speeds.
as lomcevek1 said
"I think my problem was too much power" and "I learned later that it is meant to fly at high AOA but I never tried it again"