I posted this ID question in 3 or 4 places and someone at John Cody answered first. I had posted in the unidentified catagory there. After getting the ID, I reposted in the right area for the moon moth.
Wow, I'm really pleased to have seen this in Laos! It was a good 5" across and maybe 6" long if you count the tails.
Thanks to everyone who chimed in on this.