The durability of the hybrid for me has been good. I don't hit with much topspin and have not had much issues with string breakage traditionally. Also, this hybrid seems to be tolerated by my sensitive elbow.
I think I will use the same set up as my other former Fed sticks for comparison purposes:
Gut mains and Isospeed professional crosses. I suspect I will need to go up in tension to control the larger sweetspot.