Hiya pauli62 and thanks for your thread, sorry they left ya hanging for 10 years,but Stewart since that time left Colorado and been at cz custom, you can email him from the website or pm him from here to see what her decided. A few years after that post I asked him to put the fiber optic 1mm on my Kadet kit, 75b frame, he mentioned that he needed to raise the rear blade a little to zero it, adjusting for the height of the fiber optic. I picked green,it worked out great,and completed all my mods done, welcome to see mt 2012 posts for the visual. Be well.