@murkin said: ...But there is one other thing, how do you find the geometry that you don't need inside a small model after it is completed? Well, I rather try to do it "on the fly". When you create a profile on the edge of the guitar with the Follow me tool, you will know that there'as a face inside that you won't need. Delete it immediately. Or in this case, I just "opened" the guitar by removing its top face and found what I found inside. X-ray mode and unhiden geometry can also help finding these unnecessary pieces of geometry.