Thanks George!

Also, are the new growth arms? Soon to be flowers? Is this typical for Trichocereus spachianus?

Thank you both for the ID! Great to know. Also happy to know the new grow shows I found a good home.

Hello, I got this cactus a few months ago and I’m wondering if it’s P. Pecten-aboriginum? Could someone please help me identify? I want to make sure I give it proper care over a Denver winter.