Good stuff up top. I would get the bow tuned to be as quiet as you can and then work on shot execution.I would suggest that you start with picking your draw and shot time. If your bow is slower than the speed of sound, then a deer has a chance to duck. My worst "duck" was on a big ole doe at 4 FEET from my tree(yes,it still baffels me.)I do not remember any ducks beyond 10-12yds tho. That all being said, I have killed nearly 20 deer over the last 5-6yrs UNDER 10yds. In fact I have only killed one deer over 15yds for about 6-8yrs. The longest was the above doe that I got back into me and double lunged her at 28yds. the same night.
This is all to say that I watch my scent, get me and my set up Quiet! Then I try to be ready for the shot BEFORE the shot comes. Bow up and tracking the critter coming in. Then it is just small and SLOW but Smoothe motions to get the arrow off the string. Once I quit wearing synthetic clothing, I stopped spooking deer with my draw and release,Thats why I love wool so much(I'm just saying).
It sounds like your set up is fine, and I do not mean to say that you do not know how to hunt. This is just a few things that have helped me over the years and is what keeps me in the woods. I like to put me against the wits that allow suvival in nature.When I "win" I eat good and sleep well.
Good luck,
Chuck