What were your wrist issues like? I know a lot of people can get them on the outside of their wrist as well.
It seems like I have had this no matter what the string or racquet. I am going to switch to synthetic gut for a bit to be safe, since I do prefer full poly. Grip size is 3/8ths, which is the correct size for my hand.
I currently use the Donnay Dual core with soft co poly (b5e). this happened with flexier prestiges, Dunlops..the flexier Donnay Black..just can't seem to solve it so far with a string or racquet change.