I recommend NOT spending nearly $3,000 on a camera and then scrimping on an accessory -- grip, battery, memory card, etc. Cameras today are increasingly complex, and entering untested or unproven elements into the equation is assuming risk. I would go back to shooting without the grip to confirm this suspicion. Yes -- some firm has dissected the Nikon MB-12 and duplicated it. I don't really recommend trusting people who start by stealing another firm's designs! Just my 2 cents worth. Your choice.