It's been a while since I tried OpenCutList, so I could be wrong. My recollection is that it, like several other cutlist extensions I've tried, requires you to add some extra attributes to each object, for example to tell it which way is the long axis of each board. Steve R's CutList needs no extra attributes or setup and I like that simplicity. It makes the assumption that the largest dimension is length, next largest is width, and smallest is thickness. That isn't always right but I don't find that to be a problem for my work. I prefer to organize the actual cutting of the boards based on grain, coloration, and flaws in the boards anyway, which requires me to think about which way they go.
M