In earliest days of geometric rain engineering experiments in California, suitable mountings and array arrangements were often impovised by researchers. This manually-rotatable array, consisted of seven 8-inch diameter "MT Bazooka" devices, was frequently effective under the stringent conditions of the Mojave desert, especially at night. Arrays like this were eventually supplanted and passed into history. Lessons learned through generations of such equipment, brought etheric rain engineering to the powerful, effective airborne techniques of today. Fixed-base equipment is no longer used, other than in occasional research work.