Thanks for the video, nice one.
On the topic of lasers, I am wonders which focus type would be best, I know you can get ones where the laser has to be almost touching, have you looked into those? Since the low rider likes riding low, what disadvantages would there be? All the comes to mind is if you have to engrave a curved surface like a bamboo stick with varying focal lengths, does the longer focus allow for more power at the various levels or does it matter?
As for air assist, would an airbrush like setup be the equivalent of the dual fans? How much air makes a difference?