Hi all.
I recently purchased a 75b from Cabelas. (Have also had a P-01). Did it as a phone order and when I picked it up I found that it was an '08 with an Omega trigger system. I was okay with that, but having followed this thread with interest, when I got home I put a bit of pressure on the trigger bar spring from underneath with my finger and it immediately slipped out of its hole in the frame.
I called CZUSA and spoke briefly with one of their gunsmiths. I described the problem and asked if, being a reasonably handy guy, I could effect a repair myself without having to send it in to them. They said yes. I was told three things: 1) if the spring protrudes as much as 1/4 " or more from the hole before its first bend (assuming that it is well seated in the hole to begin with) filing off a bit (say 1/16") from the short leg that sits in the hole will help with the general function of the spring (not sure why). 2) As was mentioned in an earlier post, they mentioned that staking the spring by using a sharp punch (I used an ice pick) directly next to the spring's entry point into the frame should anchor it. When I mentioned that I had thought to use a drop of epoxy or lock-tite, the smith mentioned that, 3) they often use a drop of super glue in addition to the staking, particularly on the poly frames.
Bottom line: I used a very small amount of epoxy, dipped the short leg of the spring in that, pushed it into position in the hole, and then staked it. It now seems quite solidly in place.

Thanks much for the heads up about this issue!