I'm confused, because the focuser issue you reported in your review of the B3 was that it was too stiff. I don't see a mention of slack in section 3, devoted to the too stiff focuser.
http://www.birdforum.net/showthread.php?t=300771
And I agree with the review, after having these bins for a few months, the focuser remains pretty stiff. I'm getting used to it, but I know Maven has had input from a number of users on this topic.
I like the 8x30, but the exit pupil took a lot of getting used to. The 8x30 can't be converted to 6x30 - I checked in on this last week. If they'd had 6x30 when I ordered, and I knew then what I know now about eye placement, exit pupil, and my preference I would have ordered the 6x30.
My 8x30s will need to go visit Maven at some point. I put Butler Creek objective covers on them, size 19, 41.8 mm.
One cover fit rather too snugly and when I pulled it off to adjust, and the filter holding ring and rubber armor on the tip of one tube pulled off with it (I think everything was pretty warm at the time, as they'd been in my car.)
Very simple to reassemble, the optics aren't impacted, and currently I have a zip tie belt holding the tip in place. It adds enough friction that I can adjust the covers now without things pulling off.
And since Maven set these up for me with an 8 diopter correction, the make very nice binoculars for looking at constellations in the west-southwest and lining up my red dot finder in more-or-less the right place to start hopping. That's actually why they haven't gone back to Maven just yet, they're much nicer than my 8x42s for that.