When designing a puzzle for shapeways, is there a standard or minimum thickness for a shell layer? I know that the minimum wall thickness is .7mm, but is there a standard or a minimum thickness for the wings on a corner piece or the feet on another piece that people use for designs for shapeways?

I am currrently attempting my first design for a new puzzle on autodesk inventor, which will hopefully make its way here soon , and I don't want the feets or wings to be too fragile or flexible.

I typically use 2mm. Another good number to know is the minimum stem thickness. I like to have stems that have their smallest dimension no lower than 3mm. But sometimes that's not possible, so I try to keep above 2mm.

Good luck! I look forward to seeing what you do!

-Eitan