I like to be optimistic, but don't understand how Tesla can start Model 3 production as early as July, if none of the Beta prototypes are built or in testing. To the best of my knowledge, only the two operational alpha (Reveal) prototypes have been seen in public. It was reported that Tesla ordered parts for 300 Beta prototypes last August after "pencil's down" in July. If these cars don't start to show up on the roads in the next few weeks, I don't see how Tesla can be adequately test the M3 and meet their delivery commitment. I realize subsystems can be tested on the existing M3 prototypes and on a fleet of MS's. However Tesla needs a fleet of actual beta prototypes to have an meaningful integrated testing of such things as real world chassis dynamics, range, aerodynamics, crash worthiness, temperature extreme testing, durability, reliably, maintainability, etc., Help me stay optimistic...where are the Beta prototypes??