So I called HD Service. They gave me the exact same rhetoric as my local dealer did and my shop guy. Put 11.1 oz in it and call it good. NO ONE can answer me if the 10.6oz that is listed in the actual 2004 FLHTCSE Sup is for dry or wet. So I guess I will go with 11oz and if it's too stiff I'll take a little out and if its too soft I'll add a little in.
You're making this a lot more complicated than it needs to be. One half ounce of fluid won't make a noticeable difference to the operation of the forks. Since you are starting out with a totally dry system, as opposed to just a drain and refill without disassembling the tubes, I would definitely go with the 11 ounces and then measure both legs to make sure they are the same height. Trust me, I used 11 ounces and had no problems.
By the way, if you're trying to change the damping (stiff or soft), you would do that with different viscosities of fluid, not a half ounce change in quantity. Many of us did go with a slightly more viscous fluid, such as 20 weight, to firm up the front end a bit.
Jerry