yes you are correct about liquid cooling.. it's just standard green premix antifreeze.. however I think I saw in AOA that they have a new one air cooled and power supply is inside and no lube grease pot.. but I honestly don't remember the price and I have not used it, I tend to recommend things I have experience with..
good luck with your flight.. my youngest daughter came to visit with her service dog and he was checked in baggage.. went to go home and they wouldn't let him on the plane.. same plane but his crate was too big.. very bad experience.. finally my daughter who was holding up the whole line said that she was not going to leave without her service dog because they told her to get rid of it.. yes a expensive trained service dog.. the main problem in charge decided to document it and was going to take pictures of the crate with a tape measure to prove it would not fit.. I was getting very upset so I nicely told the lady that she was taking the picture of the wrong side

so she came around and took another picture and she couldn't understand why I insisted on the other side.. hahaha it had the airlines label on it to prove it came on the plane.. also they wouldn't ship her malinois pup, even though she had a ticket for it.. because they didn't allegedly have room for the little crate.. she is currently training the malinois as a service dog and well I am not sure what all since she is in the police academy.. and his grandfather is a narcotics officer..
Mark