Thank you Herman, found it. It was back in 2002
A bit long, here it is.

Del asked , "How do you find the spine."
Here are two messages I posted on a Bamboo
Rodmakers list that I am on.
Hope this helps.
Tony    [EMAIL PROTECTED]

Subject: Spine spline
 Subject: Re: The Spine in the Splines
Date: Fri, 09 Feb 2001 16:05:24 -0600
From: Tony Spezio <[EMAIL PROTECTED]>
 There are several ways to find the spine.
I will only cover two ways here.
I put the butt end of the tip section on a flat
surface with one hand pressing down in about the
middle of the section. The other hand at the tip
so that the tip top can roll in the palm of your
hand. Press down to bow the section while you roll
the section till you feel a jump. That is the
spine. Roll the section till it bows without any
resistance, the guides should be on the inside or
outside of the bow. (curve) The guides should be
lined up with the bow and not off 90* or so. This
is loading the rod.
You will find if the Spine is off, say 90*, while
a load like  playing a
fish, the rod will want to twist in you hand to
the soft side of the rod. In
casting, the line will want to cast off center.
Harry mentioned something
the
other day about checking the spine on a table. If
you lay a blank flat on a
table with about 2/3 of the tip section off the
end and bend the tip and
release it.
If the tip is not on the spine it will oscillate
in an oval. The closer to
the
spine the narrower the oval. When on the spine it
should just vibrate up and
down in a straight plane.
 Doing this will give you an idea of what your
line will be doing when you
cast a rod that does not have the guides on one or
the other side of the
spine. (soft or stiff)
I do know books call it a spline and it may be,
but to me it is the spine I
am
looking for. I have made three G------- rods with
the guides on the outside
bend, did not like them at all. Made over 100 with
the guides on the inside
of
the bend. I find that the guides on the inside
seem to cast best for me. The
tradition I have heard is: for power put the
guides on the stiff side, for
accuracy put the guides on the soft side. I go
with the soft side except for
Casting and Saltwater rods. Yes, there can be more
than one spine but one
will
always be pronounced . That is the one I use.
I have had two bamboo blanks that it was almost
impossible to find a spine.
Can't tell you why, don't know. I make them all
the same way. Now to crawl
back into my hole.
Tony     [EMAIL PROTECTED]
After I posted my message I got several off list
messages as to why I place my guides on the inside
of the curve.  Rather than answer them separately
I will post my reply.
I may be all wet but this is my way of thinking.
Think of your rod as a bow. With the guides on the
soft ( inside) side when raising the rod to pick
up line off the water the line puts load on the
rod. It will bend and load the rod on the soft
side, (inside bend) more than it would on the
stiff side. As the rod comes up and the line loads
the rod on the back cast it has resistance from
the stiff side. It will want come back to neutral.
Being that the rod is loaded on the stiff side
now, it will want to straighten out fast and will
throw the line out with higher speed. Being that
it has to work against itself in the opposite
direction it will not bend as far forward as it
does back thus keeps from throwing the line down.
It will tend to stop quicker and throw the line
straight out instead of down. In fighting the
fish, The rod can be raised higher and the fish is
fighting the soft side, this is easier on the
tippet and more pressure can be put on the tippet
without it breaking due to working on the soft
side.
What happens when you have no spine, darned if I
know.
Tony    [EMAIL PROTECTED]




--- Harmen Boshuis <[EMAIL PROTECTED]> wrote:

> Archive link
> 
>
http://www.mail-archive.com/[EMAIL PROTECTED]&q=finding+spine
> 


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