Parallel vs Tapered?

[stringstretcher]

Here is a question for you arrow smiths that I would like an answer too.  We all know how to measure spine of a parallel wood shaft.  How is the spine measured and from what part of the wood shaft on a nock end tapered wood shaft?  Let's just say a 14" taper?  And would a full length tapered shaft be measured the same way as a parallel?

[Fletcher]

I spine my shafts after they are tapered and measure from right at the nock end to forward.  This gives me the spine of the working part of the shaft.  Spine loss to tapering depends on the spine and diameter of the shaft and length of the taper. With a 10 inch taper on a 60 lb shaft I lose about 2 lb.  A longer taper will lose more.