They're not even assembled in Colorado any more. As of June this year, all manufacturing stages are done in China.
Chaco repair is still in Paonia, though.
One of the advantages of having your local repair shop do the lifts is they can see you walk and customize the lift to you personally. David does his work at a distance and to a standard model. My shoe dude, for example, could see that I get a lot of my power in my stride from my toe-off, so he knew I'd need a scored area at the metatarsal heads and a definite taper/rocker to the toe.
Chaco stands by David's work, I wouldn't knock it!
I haven't had Chaco do any resoling yet (my 10 year old Z1's need new soles). Most of my problems have been dog-meets-sandal related...
I'm thinking of having Chaco just send me some new soles and getting my same guy to replace them. He has a less sexy and much cheaper 1/2 length lift he says he could make (though he doesn't think I'd like it as much). I might have him do that to my oldest sandals.
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson