Just a quick suggestion. I think the servo Calibration instructions should come before the assembly instructions in the tutorials. I just got a new Six from Brookstone, and because I have some experience, I calibrated the servos before starting assembly. It is a good thing because one of them was off by 90 degrees (and most were off by one or two gear teeth, nothing that a servo profile couldn't have fixed). Also a good thing because I discovered that the 20 amp fuse inside the body was missing....
I then went through the tutorial, even though I have done it before and am experienced with EZ-B robots, this is my first Six. I noticed that the assembly instructions were before the calibration instructions. If I had assembled first and then discovered that one of the servos was badly out of calibration, it would have been frustrating. Since I calibrated first, it was no big deal.