However you design it just make sure your strings don't touch the ramps. Just one of my many pet peeves. You may find that by doing so that your angle is less than you think. Sorry i can't help you with specifics, I never measured. I just laid out the head stock, strings and post profile and adjusted it until I got it where I wanted it. I do know the string angle is 15 degrees but the headstock angle itself is probably only ten degrees. it's the string angle that's important, and with tuner placement and overall head stock length, that will determine the head stock angle.