Actually, I was no longer asking the question as to how to do those types of shapes. The images are cavities that I did create (and they are fairly lightweight CAD, I might add). I now need to go beyond what was done with these, and was doing my due diligence in research when I stumbled upon this old post. I've been working with an individual that does training when companies bring FreeForm in-house, and his experience is that FreeForm has a fairly short learning curve for someone coming from either sculpting or CAD backgrounds. I guess we'll see if we go that route.