I just want to make sure I am not the only one... as I am selling my guitar because of this.

The guitar uses a straight 16" radius and man, if I play it for too long (chording mostly) my fretting hand starts to really cramp up.

Anyone else notice this with a 16" radius?

I'm aiming for a 10" radius on my next guitar.
That 16" radius can make chording difficult. 10" will be nicer.

Just be sure that your hand cramping is not from tension.
Parker PDF30
Vox VT40+