Your board length is pretty much perfect for your weight, I think it's your technique that need work. That said getting something shorter might make it easier to spin in the short term and make something in your brain click so you can spin longer boards. But honestly I think you'd be better off practicing with the 52.
The 43 will make it easier to spin and go from edge to edge, but you lose stability at higher speeds, float in pow, and wider stances, but if your in the park all day trying 180's it won't matter too much. A 46 or 48 might be a better compromise.
Last edited by freshy; 02-06-2014 at 05:52 PM.