UPDATE: Oct 2014
After a few trips on the river I confirmed that this definitely solved the problem I was having. Once the material gets wet its going to soften up and get looser. Now, when fully cranked down the boots keep a good fit even once the boots soften up. Problem solved!
Removing a section of cable to allow for tighter adjustment.
Why I did this:
I tried on two sizes and the ones a size down were too tight on my toes and I knew they wouldn't work, so I went with the next size up which seemed to fit nicely.
The first couple of times wearing them in the river they loosened up on me, as I naturally would expect them to once wet, but I then ran out of knob adjustment to tighten them down on my foot.
The next thing I tried was adding another layer of insole beneath the ones they came with to try to take up some of that space, it didn't help much.
So the last effort here was to shorten the cable and allow for more cranking down on the knob.
As you can see, the boots appear a little big on my feet as indicated by the creases from the tightening, but otherwise it is the only size option for these boots for me. I didn't realize this would be the case until I had already put them in the river a few times.
I think they'll be good to go now. I do like the boots and aside from the minor delaminating outsole edges I think they are of rather good quality.
I have the BOA system on a couple of other products around the house like snowboarding boots. I just thought this might be helpful for anyone looking to adjust this particular model of the BOA system. Apparently there are a few varieties out there.
