I'm sorry to interject, but every time you guys start talking about toxic gases, I cant help but think of this guy........the huffer.
I just chuckle at the possibility that there is one guy that probably likes the smells associated with lasing plastic materials.
Hey back in the 70's, in grade school, they told us to never sniff the metallic paints. Obviously that guy just does not listen! LOL
@LarryIwill; "The 500mw is $89 and the 2500mw is $159, So I guess Ill get the 500mw. Maybe the spot size is also smaller also.
Look around a bit before you buy those they seem a bit high! You can buy a whole new 2500mw for $205.90 and a 1600mw for $180.90 at Banggood. At least you would have spare parts that way. And they have the 2500mw laser only for about $129 and the 2000mw for about $97. The 2000mw comes with a TTL board.