Hello ,
I’m new on G+ but really excited to share my experiences with you .
This is a picture of the cooling of the C02 Laser cutting table that i’m building .
O wow that’s really awesome. Can you share some details?
Active removal of heat is so effective. I had a friends laser cutter over for some months so I could fix all the mistakes they did from the factory, and the bucket of water got so hot it began steaming, one single 120mm radiator from computer cooling did the trick and kept the water 2-3c over ambient. 
That’s definitely a little fancier than my ice in the bucket approach before starting a job.
I was not aware of how cheap these units are to buy. If you don’t care about fancy LED fans, you can buy a radiator with fan for around $20 USD. Add a small plastic container to be a water reservoir and a a few feet of tubing, you can build a cooler for around $30.00 USD. A lot cheaper than a CW-300 and the same effect if it is as good as +Micheal Andresen states. For this amount of money, I am willing to give it a try.
I decide to get a 240mm version, radiator and two blue LED fans(could not resist the bling) set me back $40.00 USD Will report on its effectiveness once I have had time to test it.
@Michael_Andresen You appear to be running 3 of the 120mm radiators. Do you think the 240mm version I bought will be enough for a 40-50W laser tube?
This looks like a really cool solution can’t wait to hear more about the parts and more pictures.