1. there is no way to " calculate" a nocking point. Start at 1/8" high and go from
there.
2. you can move the loop up and down your string simply by spinning it around
your string.
3. no, you will not get the same arrow flight if you attach you release directly to
the string.
4. yes a small adjustment in the location can make a big difference in your tuning.
Only move your loop one twist at a time until you get it right.
5. you don' t need to wory about any of this for 300 shots or so to give your string
time to strech.