I'm curious as to finding spine also. I've had someone else describe the procedure, but wouldn't mind hearing it in someone elses words.
I bought two seperate 1/2 dozen sets used from different people. Both were supposed to be the Alaskans, but one set weighs 60gr per arrow heavier than the other even though they are only 1.25" longer, so I assume one set is really Sitkas & the other Alaskans. The heavier ones have more of a carbonfiber look showing, while the lighter ones have a more amber appearance with the carbon showing through less brialantly.
With the light ones assembled 28.5" bop, with the standard insert, a 125gr glue-on adapter & a 140 gr point, wraps & 3 5.5" feathers I get 700gr.
The heavier ones are 29.75 bop, & 3 5.0" feathers, otherwise the same. They weigh 760gr.