There are some diagonal grids for HPQ
if you are interested. The pink down angle is part of a disjoint tool angle anchored off the 2 red ellipse points. the pink (purplish because it's overlaid on top of other angles) is the reflected angle in disjoint position (centers not lined up over each other). The fib channel is then laid over the disjoint down angle and spread apart until other points line up (down angles). The same process is done for the disjoint up angle and the fib channel laid over it. I use a calculator and the inputs in format to make the distance between lines the same up as down. The up and down angles at this SCALING are both 14 degrees. I have other charts in publlished that experiment with this idea. There are more objects in the objects tree. I made 2 scale settings. One for this (vertical purple arrow) and one for the fib speed arcs (in the objects tree. I used the "apost" equation in ideas (for my TI-85) to calculate the vertical distance between parallels. This is precisely set up and calculated from the format inputs.