- Mar 17, 2013
I was about to pull the trigger on a dragon lasers viper 50mw 637nm pen but decided to ask if anyone here has something in this category wanting a new home? Or perhaps if somebody is bored and has a few spare parts they could throw a decent pen together? Pretty sure something using the old Sanyo 637nm 40mW diode would be perfect. Just thought I would ask, thanks!