I’m moving from “D&D 3.x” to Pathfinder as my base. The material is much more accessible and better structured for my use.
I don’t expect the changes to what I’m doing be all that big, really, since the differences between D&D 3.x and Pathfinder are generally smaller than the changes between either of them and Echelon… but I thought it might be worth mentioning, in case the question comes up.
If there is a rule not described in Echelon, look up the related point in Pathfinder rather than the Revised System Reference Document.