I too bought a Kadet 2 conversion kit for my brand new CZ 75B .40. The .40 ran without issues and when it was time to shoot with the Kadet kit, it was nothing but problems and frustrations. Failure to feed and FTE/stovepipes at every mag. At one range trip, I gave up shooting it after just 30 rounds.
I was really disappointed with the kit and was wondering what is wrong it. I mean all the videos I've seen on youtube about the Kadet kit ran without a hitch. I said to myself, maybe it just needs to be broken in...So, after 500 rounds through, it seems to have minimized the FTFeed problems but I was still getting jams and stovepipes. Frustrated, I looked online to see if anyone else was having these issues and I came across this post!
This post is of great help! After some filing, I went last night to the range and ran 200 rounds (100 rnds CCI Mini Mag/ 100 rnds Winchester Xpert HP) WITHOUT any problems! It ran and shot FLAWLESSLY. From frustrations to in love with this kit. My...what a difference. So, Thank you so much for sharing this simple solution. Much appreciated!
After pics. Filed the ejector from 90? to about 110?-115?. Problems solved!

