I just want to point out that you can use appearance mode and setting stock models to glass mode. This trick makes it possible to display stock models translucent and the other models opaque

I am the completely opposite in that mind set. I almost never use Stock Setup and always use Stock Models to define my stock. You have a valid point about the RED outline, but the problem is when making setup sheets and other things that red box is only part of the picture. When I am teaching someone to use Mastercam and they have a Standard geometric Shape they are using for stock then I tell them to make a Solid Model. Then when making setup sheets and other documentation it just looks cleaner. I like to always use a stock model for Opti-Rough and by having that already defined from the start then no need to go back and define it after the fact. We all use the software in different ways and here is a good instance of personal preference. When teaching others Mastercam I try to always make this comment. My way is not the right way it is just a way in which I use the software to get the job done. End of the day as long as we accomplish the task of making the best part possible without wasting time we have accomplish that task.

The functions are basically equivalent. It is really just personal preference on which to use. However, there is still one advantage to using the Stock Setup function. When you have your models Shaded, the Stock Setup (red) always shows as Translucent, even though your other solids are opaque. I typically do not use a Stock Model for "initial stock". I only use it for in-process stock. However, both work for specifying stock for Verify.

I made separate custom tool libraries for different materials and never use calculator and would never trust this important task to any calculator ,even the best . I prefer to set them myself (BTW ,they can be specific to tooling ,flute geometry ,rigidity of setup ,machime ,machine power and more ,more ,more ...)

An interesting topic.. thanks for posting