Acoust,
Yes, with the weight pockets on the infinity, you will sometimes notice a 'hitch' when sliding. Just make sure to take a look at the weight pockets and where they are sitting when you try adjust, when it is meeting with resistance, you'll notice that they are likely flopping down a bit kind of pulling on the belt. If you straighten everything out a bit, it should slide just fine.
Also sometimes you might notice the rubber light retainer having moved down (if it's not being used) and slipping through the cinch assembly binding things up a bit
I use the ACB10's when diving a single tank, with 5lb soft weights in each pocket.
one thing to remember is once the BC is in place, you can loosen or tighten the system in the water. Just put your reg in your mouth and lay face down so that the floatation of the wing is 'unweighting' the system will allow it so slide most readily, upright (with gear unweighted by wing) also works but not as well as face forward like in the video.
http://www.youtube.com/user/Halcyonmfg#p/c/60BFCC6E6C9B006C/2/P-FT5Z9vTsU
sometimes if your waist strap is loose once everything is in place, it will actually 'v' down and make your crotch strap appear looser. if you find that things are sloppy where they were not a on land, try tightening up your waist strap a smidge.
The beauty of the cinch is that you can have the shoulders the 'correct' length for a stable system and still be able to get in and out of it readily thanks to its adjustability.
As time passes you may find you only need one side adjustable, and can fix the right side with a triglide.
if you find that you are getting it "too tight" or want it to 'remember' the perfect size, you can also put a triglide stopper in at the 'smallest' you want it to go (so it will be on the shoulder strap side) this will allow you to make it as BIG as you want, but stop it from tightening up past where you found was idea position for you
