I think that is the ticket for most that want to try such themselves.
One sees some sales of tungsten wire on Ebay made for fine and medium crosshairs. I thought I would be smart and use a strand of human hair, the result was like having a reticle made out of telephone posts. I took the eyepiece off and removed the reticle tube that housed the crosshairs(wires). I once bought an old 15x or so Unertl that had some cosmetic issues and drooping crosshairs. I am probably a bit dated, but when Unertl repairs are thought of here, I seem to think of Parsons or Ackerman.
