Testing spine on super stiff arrows?

[Old York]

I was reading the post about using #100 bows & folks were looking for ways to build really super stiff-spined arrows. There's not a lot of deflection change in the super stiff shafts (from one spine group to the next), so what do you use to measure deflections? 26" centres & 2# or other? Just wondering, thanks.

[term]

I have a Spine-o meter. It has 3 different setings, heavy goes to more than 200lb. Great product.