i see what u muean, the viewer has to learn
mayb like u said a tips and tricks one would be quite nice but i think some ppl wanna learn nurbs fro the start an like some tuts it says create curves like these(ie the car tut on 3dtotal for example and it shows curvs in correct place), i mean dont go too basic (ie explaining projection ect) but cover the bare essentials for it so that u wouldnt get too stuck