The crown on my fork is panto'd Faggin and not Air and the tubing stickers on the downtube are gone. The only tubing sticker is the Columbus ones down the fork stays. The only reason I know it's SLX is the seat stay panto is a crown with SLX in it making it a King SLX model and the rifling you can feel in the down and seat tubes. So who knows what the forks made of??? It does have rifling in the steerer tube though. So definitely Columbus.

I'm just going to assume it's Air and was an upgrade from the factory/shop/customer upgrade. I would question it more, as to it being original, if it were a Tretubi frame but it's their highest ranked frame. This is definitely a keeper and I'm mostly just curious about what I have.

Thanks for everyone's help. The wealth of knowledge on this forum is always a pleasure!

Did another 50 miles with 2300 feet of elevation gain on it from my house to Buffalo Bills grave today. You can barely make out the Coors plant down below.