Khalan Weaponry is my company. Never mentioned anything due to the advertising rules here. I'm still way behind on the group order we did any something awful... probably be 1+ months before anything ships to other folks outside of that order.
I've had a few people cancel orders due to the wait, but these guys at sa pre-paid, so their orders are the priority. I would have replied eariler, but I didn't know this thread was out there.
*Edit - As for the mentioned above, Justin is a talented machinist. Their jig is nice, but I also use the one that AR15plus.com offers. Both jigs have pro's and con's. The only thing I didn't like about the one from CNCgunsmithing is that they didn't countersink the holes for the two screws that hold the jig together. Which can be easily fixed.
AR15plus.com's jig has the angled cuts on the side for the pistol grip hole and the buffer retainer hole. Makes it nice. Though theirs is a bit tall which causes some other work holding problems.
But then again, I these jigs for 0% - 100%... so either would be sufficient for 80%-100%
*Edit2 - As for picking out an 80%, I'd definately suggest one from a forging and not a billet 80%. During the forging process, the metal gains some great strength. This is solely based on the fact that if you were to drop a billet, it would dent/flatten to some degre - forged aluminum will not. Cast aluminum will do it a lot worse then a billet though.