I'm using a chinese laser with a RECI V6 150W laser tube for more than 2 years now. The water chiller for the laser tube is a CW-5500. A local laser salesperson told me that this model is unsufficient for this tube and I should buy a better brand and model chiller. What do you think about this CW-5500 water chiller? I see this series everywhere on every advertisement on the internet, because it's relatively cheap compared to other water chillers. What chilllers do you use with RECI V6,V8,W6,W8 laser tubes?