He does have access to all the gases, which I've been slowly accumulating for my own projects. Whop is getting trimmed as I have so much extra height, and truly Mytek's window ac approach is novel. Many of us phasers have done window AC chillers and single stages, but always been too bulky though cheaper, he's used all that space. Even my cascade with small compressors in a window ac wasn't as nice and sorta cramped. He's done a hell of a job.