Wedbush Securities walks away from the Detroit Auto Show and investor meetings with Tesla Motors (TSLA) full of love for the EV automaker. Increased battery production from Panasonic during the second half of the year and the potential for a second Model S production line this year sets up with for the company to solve what Elon Musk called its "production constrained" riddle. Progressively lower battery costs should help support margins, notes Wedbush. Shares of TSLA are up 0.3% premarket to extend on their double-digit rally this week.