3D Puzzle, help create a gap for 3D printing

[Anonymous]

Hi there. First attempt using Autodesk Forum for help.

I have made a 3D puzzle for 3D printing, but all pieces are so cramped together that I would like to create some space inbetween each piece.

I would like to have atleast 1mm inbetween each piece to have them all fit without having to force them, without having to scale the diagonal side of the puzzle as a whole. (looking at the images, the grey sides don't need to scale, just the colored parts, if possible.)

I was wondering if there's any advice and suggestions for how to approach it, other than manually adjust each piece.