JeffTilley Ok, got em spined. Now to find the time for assembly. Question-spine at 9 o’clock for accuracy, 3 for distance?
What you are actually looking for in spining is is the NBP (neutral bend point) which will be 90° from the spine plane. Shafts can have one or two NBP's. I always align the weakest NBP to target. Theory is the strongest spine at 12 o'clock will minimize toe droop. You are really opening up a can of worms here about spining and floing (flat line oscillation). Do a web search about golf shaft floing perhaps on Youtube. Seeing a shaft being floed is enlightening. Too bad FGI is gone. It had a wealth of info about spining and floing.
Regarding your spined shafts you need to find out if the marks on your shafts are the spine plane or marks to be oriented to target.
My first experience with spines was with a Grafalloy sheet wrapped graphite driver shaft. I got the appropriate flex and oriented the graphites to 12 o'clock. Man this shaft was like rebar. Shortly after I read some articles about spines. I built a simple bearing type spine finder and discovered that the shaft had a strong spine plane. I reoriented the spine plane to 12 o'clock and it was a totally different shaft. I later discovered after building an NF2 that the shaft had well over a full flex difference between the NBP and spine plane.