Getting new carbon fiber props which have the self locking purple and blue colored nuts, as opposed to the factory black and white nuts. Does anyone know if the purple replaces where the black nuts get installed on the copter?  Due to the CF props having no directional arrows showing installation, I don't want to cross thread the nuts by trying to install them where they don't fit.  Thanks

Don't think you'll have a problems as two are left hand threads and the other two are right handed. They are either go or no go when you trysts install them. I don't recommend the carbon fiber props as many users have found, they do work as good as the stock props due to their hardness and no having the same flex. Yep the flex and give of the prop is important too.