chinese machinery have "NO WARRANTY" there "guarantee" is useless (they require proof that parts are defective and ask for its return) by doing this the cost of return "shipping back" cost more than buying new part,from most countries in north america.

I am down 2 laser tubes, the original failed with 16 hours on machine and the cheap one I bought from SDZlaser lasted less than 6 minutes...and they want the tubes back to honour warranty, ive pleaded to them "why not just the no# metal parts" nope need all tube, Ive told them the cost of return makes it cheaper to buy a new tube, yes we know..end of story.