RE: katana snaps with minimal elevator input
Impressive letter...Yes, True....mostly
(Torque)
"Now, there is such a thing as too much power / torque. I once had a plane that was so over powered, on vertical climbs, the plane would do a slow roll to the right. Flying straight and level, it would roll to the right."
Only if your propeller was turning backwards. Have you ever seen an airplane torque roll to the right? I think he meant left.
(CG)
"With the problems being noted, I would recommend changing the CG to a more nose heavy position along with the other changes in the elevator control throw as mentioned in an effort to solve the situation."
Actually a more rearward CG, closer the CL will result in a slightly higher AOA before a stall occurs because you are offloading some of the weight from the wing. That is also why a plane with a more rearward CG will also fly faster.
I do applaud Brian from Ultra-RC for writing this letter. It shows a great deal of knowledge, concern and support for his products.