Hi NightCabbage,

> Any idea what I'm doing wrong?

Hard to say without examining the model file directly. Can you please post the 3DM model file (before shelling it) so I can check it out?

But it kind of looks like you may need to do an extrusion rather than a shell for the filling piece, because your shape is based on an extrusion rather than an offset.

Note that the angle used in my shape is different than your most recent one in this area here:



Your new one goes straight upwards, unlike your original one which was shaped more like mine I think?

- Michael