Yeah man..I string low too with full poly. Another super key part of it. I think you should only use full poly if you use a western grip and heavy spin. You can get away with low tensions due to the spin you put on the ball. I would not string cyberflash higher then 54#s full, and I will drop it to 52#s on the Prince..one of the reasons I am trying the racquet. I want to be able to string as low as possible full poly and use a flexible racquet. I can probably get it to 53#s with the Rad Pro before it get's tough to control.
The Rad Pro has enabled me to play with full poly, low tensions though..I could not go lower then 55#s with the apdc.