Atomstack A20 Laser Mount

I've updated this to make it permanently mountable by adding vents to the top. Also, created a better fit by expanding the inner walls and extending the downward sides.
The laser mount diameter has been reduced to better accommodate a 10mm dia. laser, and the gap spacing has been improved to increase grip adjustability.
The mount has been moved on the y-axis and extended on the X so that the only alignment compensation needed is 50mm on the X-axis.
An insert has been added to seat a CR2032 battery holder.