So think i've found a possible basis design that the G2 is modelled on. Edmund optics has an asphere lens for 405nm, D6.325mm, FL4.02 [https://www.edmundoptics.com/optics/optical-lenses/aspheric-lenses/Blue-Laser-Collimating-Aspheric-Lenses/ Stock #83-990, and they have a zmax file that can be...