liquid nitrogen? what brand are you currently using? and what kind of maintenance does that require if any?

I designed that system myself and gave the blueprint to the factory asked them to produce for me.

Pics or didn't happen

Every ln2 system ive seen is usually like a piece of tube with stub at end that bolts down. I haven't seen everything though, and i'm sure there's a means to do some kind of recirculating system if you wanted to have 15k invested into a cooler for your pc.