I own a PD+ cortex and a PD+ Roddick cortex.
I have a 1hbh
I strung it with full poly, usually at 57.
My fav strings is polyplasma 17 (1.25 )
I just made it restrung from topspin cyberflash to an unknown string (I think its prosupex) that the stringer suggested. I'll try it thursday.