Hello Gary. We're always gentle here, this place is all warm and cuddly.
Re the answer to your question, sorry I'm no help whatsoever, that's far beyond my ken. I do keep getting emails from a nice lady in Shentzen offering me lasers at ridiculous prices, but so far I've resisted the urge to get one. I do know that some folk on here have bought direct, so I hope they'll be along soon.
May I ask you to pop across to the Newbies forum and introduce yourself, we're a nosey lot, and we like to know a bit about who we're conversing with. Also, it can help us to give better advice.