Beleaguered by a slower-than-expected production ramp-up of electric-car maker Tesla Motors‘ (NASDAQ: TSLA) late 2015-launched Model X, first- and second-quarter vehicle deliveries in 2016 were below management’s own expectations. These missed targets have left Tesla behind on its aggressive goal to boost deliveries by 58% to 78% this year. But there could be one catalyst positioned to help Tesla still deliver enough vehicles to at least hit the low end of its guidance range for 80,000 to 90,000 vehicles this year: its new, less expensive versions of Model S and X.