Sounds good ... thanks.
Somewhere I have an Autocad drawing of this, but no longer the program to open it. The stop consists of a drilled and tapped vertical hole in the frame that contact the trigger on the left side. The hole is drilled almost at the back of the left channel milled for the locking rollers. A quick look at the mechanism and you should see how it works. I’d be glad to send you a picture if you like. I’ve never seen a trigger stop on this gun and it improves it a lot. Tried to send the info to a CZ52 website once but there was no contact information. It would probably be a good idea to use my idea but make your own measurements as these pistols might not all be the same.