Hi

i have been keeping an eye to replace my current iron, which will remain nameless , I've been On the look out for a 2nd hand Ap2 with dynamic gold sl stiff, as I bought a 712u 2 iron with the above shaft and love it. Favourite club in the bag. The  reason I'm looking 2nd hand is I know I'll want to change when the 716 come out. The ap2's are proving to be gold dust but have come across some 712cb, so I'm guess I'm asking is, how do the 712u and cb compare? Is the forgiveness  similar or I'm I just kidding myself that I could hit them. 

i'm a mid handicapper but my irons and esp my long irons are my strong part of my game,  so are the cbs something to be scared of?

Thanks in advance for your answers.