K40 Laser Engraver Red Dot Upgrade

In review of the laser locator ideas/concepts...I've found that the cross hair principle was not good enough (for me). The ones that have two line lasers mounted to an air assist would require re calibration after removing to clean the focal lens (which should be done every time you use the laser). The dual line lasers mounted to the bracket that holds the head would eliminate this issue, but I have found that the thickness of the lines is not as narrow as I would prefer. I've reviewed a coup