Regarding your torso length chart...
I have a 18.5" torso measure ALONG THE SPINE (IOW, not projected to a parallel surface).
I found the Moonlight to be way too long. The shoulder straps came straight up off of my shoulders rather than around the top and then down an inch or two. With this particular pack, it seems like the torso length is fixed at the "width" of your pad. Typically 20", less 1.5"-2", as the hipbelt's midline is a bit up from the bottom of the pack. I returned the otherwise beautiful pack because my shoulders got sore after carrying a 22# load on a 18mi day-hike (weekend load).
I now own a Katahdin, which I still find to be a bit long, even with the hipbelt raised to its "highest" position.
I have since discovered that the sore shoulder problem is due to a posture change (leaning forward too much) that occured when I tried to wheene myself from using trekking poles.
I have read the intro article and this one, but some of the torso length assumptions seems a bit odd.
BTW, I was using a Wally World 20"x50"x3/8" closed cell pad folded 2 twice in both packs.