So I recently decided to build a set of single length irons with my 712mb heads. I put an 8 iron shaft in each head and used lead tape or a drill to get the head weights to all be close to 265 grams. I also had all the lie angles bent to 66*. I have really enjoyed the simplicity of the set up. I have not lost much distance in the long irons, maybe around 5 yards, but I am not a long hitter anyway. Wondering if anyone had tried to do the same and how things worked out for you.