I have a part that requires a circular groove that has a bizarre curved profile ( see attached). How does one model this goofy thing? I have considered the solid bodies combine feature but can not figure out how to get the profile correct since it is a circumference style profile. Flat plane would be easy... Any thoughts??? To complicate things, my true part has a much larger OD and smaller ID and about six such grooves in a single body part of which each have a different profile. In a sence, it is a matter of using a sketch that has the same shape as say a ball end mill cutter and use a SWEPT CUT command. However it is the generation of the true cirular tool path that has me stumped. This method would require a two step process with a cut from the top then a cut from the bottom. How does one get the circular path modeled up??? Damn - my head is starting to hurt:).