Whoa, Alvin... now that you will surely understand and use intersect, what will you achieve? I just can't believe that you did your MECHA I with only negative and positive booleans! That's amazing! Here's a very quick example. It's the same fridge I used in my "One For The Road" pic. I wanted it to be "fat" (dunno the right word in English, sorry), so I used a cube positive, subtracted the interior with a negative cube, then made the group positive and made it intersect with a large oblong sphere to achieve the "curved" result. Shelfs, glass and handle added after. Stefano