I gave up on Novak 8 years ago, went to Speed Passion and will never look back, rock solid performance, never an issue with them to date, and I own 5 of them No need to drag the laptop to the track either, they have a nice hand help program box that comes with the ESC, and it can adjust any aspect of the speedo that you can on the comp.
http://www.speedpassion.net/us/catagory.asp?c=ESC
Kevin