Am working on a screen cast of me apparently ruining closed crv's. Lol. I start out with shapes that are solid and closed and stand up to the naked script. Then during the process of networking or installing faces the joined shapes must be unjoined or partially so to use the network command. Then when rejoined or attempted - the naked script lights up everything including the originally closed shapes. So - that means there are gaps and spaces correct? If I assign blue to the heel shape and cyan to the profile shape - when I install faces I get a blue wall on one side of the heel and a cyan wall on the other - that can't be right. So I will post doing this so you can see where things go wrong.

The video link posted of the guy doing a neck in Rhino is helpful for a beginner (hello) to a point - especially the heel - in fact I'm pretty good at heels. When he does the headstock he uses more advanced modeling techniques - and as I'm still learning the basics and commands are a tad different in Rhino I'm not exactly sure how he goes about it - although I can see how easy he makes it look (see photos). I'm trying to do the headstock transitions using basic networking first before I move on to the method below.

Conversely, the fillet, trim and blend that I've learned from Barry has been incredibly helpful/useful and am continuing to practice those methods everyday to get proficient. However, want to learn the networking because it lends more control over the shape, length, height of the transition area.