cuff alignment is cuff alignment. the k2 works exactly the same as the lange with one exception, and that is that the k2 has adjustment on both sides of the boot instead of just on the outside like the lange.
that just means that the k2 cuff has more range of lateral cuff adjustment.
for proper adjustment on any boot, you put your footbed in the shell on top of the boot board, stand on a level surface with your boot width such that you can achieve a comfortable balanced stance, then look to see where the leg lines up relative to the lateral sides of the boot. then move the cuff either direction until the lower leg is neutral to the cuff/spoiler. tighten up your adjustments, then move on to checking the boot sole relative to the
you need a second set of eyes to accomplish this, because any twisting around above the boot so you can see where you end up will give you a a false read.