The threads on your Zenith v2 probably stick out a bit and it won't screw on to well made mods with good tolerances (I would include GP gear in that category). You can take some fine grit sandpaper and wrap it around the Zenith's threads and spin it a few times to sand them down.
Thread moved super-fast, already on page three of part three! I see a contest is going, very nice of the secret summer santa whoever it maybe. Good luck to those who entered.
Have no idea of what Perseas is stirring up...
But my number of 22 - in the old thread, that post # was made by yankeebobo
I love trying to figure out something that I have absolutely no idea about