I vaguely remembered this mod when I had a few Mavericks open the other night, so I decided to give it a try.
I didn't want to use the air restrictor spring, however. I didn't think it had enough oomph to make a difference. So I tried a leftover spring that normally nests inside the Mav's eject button.
It was too long, and prevented the cylinder from rolling out. So I flipped over the gray bracket from the front of the cylinder,

And found that there was no way the spring could seat inside the bracket at all, thanks to four cross-pieces put there for support, I suppose. Meh, who needs those? I painstakingly chopped out those little plastic supports, leaving just a round peg there, (the outside of the 'well' the metal rod sinks down and through. The button-spring was barely large enough to slide down around that peg, and it still wasn't quite enough to reduce the spring's length enough to allow the cylinder to eject. So I trimmed off about a sixth of the spring with some wirecutters.
Put it all back together, and it worked nicely. Unfortunately, I noticed no change in ranges whatsoever. It still gets air-restrictor-removed ranges.
I think this mod could possibly contribute to better performance when combined with other changes (like that o-ring) but on its own, the difference is negligible.
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