Last night, I knitted a small sample on the 28" Authentic Knitting Board using just 22 pegs (and 22 pegs on the opposite side, too). I used some Berroco merino and followed the beginning of the pattern for the Luxurious Alpaca Scarf. What I learned is that I need to tighten the gauge because the knitting was a little bit too loose and the ribbing, which starts after six rows of stockingette, was not very distinct.
This board can be adjusted. Do you see the bolt on the end? There's another one on the other end, too. You may remove the bolt, take out the spacer in between each side, and then put something smaller in between, such as a washer. I'll have to scrounge around in the toolbox tonight for something appropriate. The closer the two sides of the board, the tighter the gauge. So, if you're working with a chunky or bulky yarn, or if you want a very loose knit, you would actually put more space in between the two sides instead of keeping it snug.
I was brainstorming last night and came up with a way to, possibly, turn this two-sided loom into a round loom by adding my own type of spacer (a piece of wood with two metal pegs). That way, I could knit socks or other small-gauge items in the round. We'll see how it goes.