I had the Nitro Extreme, nice idea for a sight, but had alot of problems with mine. The first thing would be to get rid of the thumb screws and go with allen heads. Mine also had a problem with the fiber optics that ran around the outside of the sight, they were loose and buzzed when I shot. Another thing was the flimsy plastic sight pins, I got a twig in my sight last year and broke 1 of them off. This would be a awesome sight if the body was made of something other than plastic, the pins were steel, and they didnt come with thumb screws. Alot of problems for a 90$ sight.
I finally took mine off and went with a CopperJohn's DeadNuts.