I got some questions for you..
Which HB kit are you gonna be using on the S5?
Are you running dual arm pump kits on the S5?
If and when you anno the S5 are you worried about the etched 'CCM' and 'S5'?
The top tube...as per HB specs (0.32") I see yours is longer, what are you going to do for a bolt?
When you finish slotting the hammer, which bolt pin are you gonna use?
I'm quite impressed with your milling on the S6, about time someone milled one lol. I didn't mill an extra slot in the S5 body because I will not be using a dual arm kit or re-annoing.