This week I sat down and gathered as much information as I could find and figured out most of the Siege sigil stuff, file found here. I also found the Pulse article that gives the proper names for the various weapon icons (by inference, nothing so helpful as a KEY or anything). What I'd been calling STR is Damage, ACC is Precision (okay, so pretty close on that one), FRB is Range, Armor is Defense, and I got Heft right (but I think I read that somewhere earlier). So I've gone back and updated all the reviews with the new information.
---Dave