ColorPerfect (Color Neg) takes the linear scan from Vuescan and applies negative "profiles" for specific films to it to produce a positive color image. I will then take this image and do a BW conversion using one of many tools (color channels, Silver Efex Pro, etc.). I actually was aiming this question at anyone who is familiar with ColorPerfect regarding whether I need to tweak the process of making the color positive if the intention is to then convert to BW. Thanks!