I have temporally placed a compressed folder with all the listed files at
http://mgrunes.com/boots/ToKaitsu.zipLook at
ToKaitsu.rtf for an expanded version of this post.
WilsonbladeRadius.jpg is an old (2014?) diagram showing typical MK and JW blade main and spin rocker radii, from 2014, or maybe earlier, that I found on the Internet. It does not agree with Paramount's drawings, like the ones you posted. Interpret that as you will.
I use
rocker.png (also at
http://mgrunes.com/boots/rocker.png) to measure blade rocker radius. It contains embedded scaling info. If your printing app prints it at the right scale, the dark horizontal lines should be 1 USA legal standard inch (2.54 cm) apart, and the light horizontal lines should be 1/4" apart. (Note: not everyone uses the same "inch", not even in the USA. E.g., Finland used substantially smaller inches. A good reason to use the metric system?)
But the detail level is only about 600 dots/inch, not good enough for production purposes, but good enough to explain what I mean. I think I produced it from postscript file
idl.ps, which I think I created at 2540 dots/inch, using my IDL language program
rockerprofiles.pro.
At the vertical center the (curved) rocker profiles are vertical (straight up and down). So a tangent line drawn against them would also be vertical.
I have cropped portions of the 7' and 9" radii curves near that center, and rotated them 90 degrees so the curves are tangent to a horizontal line, in files
7foot.png and
9inch.png. (At this scale, the 7foot.png curve is effectively a horizontal line, because the resolution isn't high enough to tell the difference, so the 7' curve IS effectively a tangent line.
)
I sort of joined the two images together to produce
sweetspot.png, and added a red tangent line, which is horizontal. The vertical line at the join point is part of the radius line for both curves. The place where the two dark joined curve is what I was taught to call the "sweet spot" (the point at which the main and spin rocker curves join) in a blade produced with 7' main rocker and 9" spin rocker.
I have labeled the main rocker, spin rocker and tangent line in
sweetspot2.png.