Beautiful, Evan!
As far as tuning: if you're shooting wood arrows, IMO, there shouldn't be too much tuning involved when shooting a Hill style ASL.
I picked up one of those "spine test kits", and found that from 41# up to 57#, my HH Big 5 shoots pretty much the same. That is to say, deviation in the flight of the arrows was FAR more due to my technique, than it was to the arrow spine! :eek:
Same for nocking point placement. After a lot of experimentation, I found that an arrow showing "nock up" or "nock down" on impact was again almost totally due to my (defective) technique, than it was to nocking point placement.
So now I set my nocks at 1/2" up, and don't mess any more with them. Since my shafts are 11/32" in diameter. that puts the bottom edge of my arrow at slightly over 1/8" up from level with the shelf.
My technique is slowly improving. As I get better at keeping the direction of pulling force in perfect alignment with the arrow point (both vertically and horizontally), my arrows fly flatter and with a straighter trajectory. (I'm referring here to keeping the force of my bow grip, the string, my wrist, my arm, and my right elbow all perfectly aligned with each other and with the arrow point.)
FWIW: my Big 5 is 45# @ 27". Currently I'm shooting 50-55# spine, 11/32" POC arrows, cut to 28.5" BOP. My draw is 27".
Best wishes,
Frank