The 7mm G7 is used for our lasers and we released a 9mm version so people can mount the G7 lens on their own lasers because some lasers are incompatible with the 7mm short barrel.Is the difference between the 7mm holder and the 9mm holder the barrel length? The site assumes you already know.
The dot size is little big for just 20ft, please get the laser beam focus to parallel first by adjusting the laser front head.I have the challenger II 3W 445NM and im not sure what's going on it isn't a dot whatsoever I have it fully focused and it really doesn't burn anything like the video I saw https://youtu.be/N-a4vJvLq1w basically at about 20ft it seems like the line itself is about 2inches long, will not burn paper but just vaporizes it basically. Not sure if it's not ok or what
^^^It's single mode so it won't make any difference in the output, other than power. :beer: