Many thanks MoP, that's the trick I was missing then, relaxing only part of the shell. Thanks for the script too, how does it work? (havnt got access to Max on this comp).
If you are a 3dsmax user (version 9+) you can check out TexTools which is a bunch of scripts in 1 toolbar. Anyway in TexTools there is a symmetry tool that mirrors either one side to the other one (select half of the faces to mirror) or just select the edge mirror and average booth sides. It works like this: Just make sure…