Tesla plans to cut down on the number of options and variations it offers with the Model S in an attempt to trim complexity and cut down on production delays, as the company announces revenues up 55-percent year-on-year for the most recent quarter. Quarterly deliveries for Q3 2014 were actually at their highest ever, at 7,785 cars, with Tesla making as many as 907 deliveries in a single day. However, the electric car firm was again hamstrung by production bottlenecks, unable to meet demand. As a result, Elon Musk wrote in a letter to Tesla shareholders, the company plans to pare back the options and combinations that can be selected. Exactly which are going to be dropped is unclear at this stage; with the dual-engined Tesla "D" variant arriving in the new year, there were to be six core models and then further variety possible with options packages. Update: During the Tesla financial results call, Tesla CEO Elon Musk confirmed that the Model S P85 is being retired in favor of the Model S P85D.