You might get reg creep eventually if you fiddle with the regulators the wrong way. I have an m3 as well in 22 and I went down the high power slug road and somewhat regret it. The quality of experience is not as good as it was stock. I've got the tensioned barrel, slug liner and tungsten hammer(for the big changes) . I think the tungsten hammer is coming out and that should bring it back to super enjoyable.
Don't adjust the power wheel while cocked, don't adjust regulator pressure downward while energized, don't chase the power dragon with 1000 fps slugs heavier than 30 grains in 22 and I think you'll have a wonderful experience. If it has a powerblock fine, if not it made zero appreciable difference for me having an early non power block m3 that I converted.
It was superb out of the box, and I couldn't leave well enough alone watching all the south African Infomercials on youtube.