Originally posted by Edvinas Thak you for your responses.
Unfortunately it seems that KatzEye and K-5 need calibation and basically that a no-go for me
if you think about it, using a split prism type screen is giving you better accuracy in focusing a very shallow DOF; this is a level of precision beyond what the stock screen can offer. The factory installation of the stock screen permits much more "slop", which is revealed with a screen upgrade. So, the issue is nobody's fault, it is just whether or not the factory installers "guessed" right with the original shims.
With the Katzeye (or any other split type screen), you want to get the shimming exactly right because if you are even slightly off, you defeat the purpose of having such precision. I have thus come to conclude that anyone who upgrades their screen should expect to need new shims to get it right.
personally, i dont find the swap out to be difficult, but every time i remove and replace screens and shims, i introduce more dust and risk dropping or scratching the mirror or screen, so it is not my favorite thing to do. good luck!