Hi everyone ... I'm new here, in need of some help. I have a 60W Chinese/Redsail look-a-like machine (off eBay!!) that's been in use for less than a year ... I was cutting acrylic today and there was a loud 'pop' from the machine, followed by no cutting progress. I paused and checked, and found the end of the CO2 tube had broken off ... don't know if it was an overheat, or it just wore out ... But I need to get it going again. Any suggestions on a better replacement unit? I'm in the USA. and any other advice totally welcomed too! I've been scanning the forum, a little overwhelmed with the amount of info!!!