Everyone is still good. Strong appetites on the foods they like and all have taken to snails and scuds.
I finally was able to get a shot of each one individually, so I can post profiles now (sorry for the crappy pics, they are fast…).
Huey:

Notable characteristics: Black spot under mouth, bright yellow colors.
Behavior: Calm, intelligent, very well tank-broken.
Dewey:

Notable characteristics: Fat, long teeth, typically more of a golden yellow with faint stripes, black mark on caudal fin.
Behavior: Glass surfer, strong food response, the classic Amazon puffer behavior.
Louie:

Notable characteristics: Golden yellow with strong stripes, smaller black stripe behind anal fin compared to Huey and Louie.
Behavior: Thinks he’s a dwarf puffer, wallows in gravel, disappears in plants, not much of a feeding response, but I know he eats.
All 3 show no signs of aggression to tankmates. The tetras and loaches have also calmed down, so the tank is very peaceful.