ESB EE-3 screw sizes for assembly


Jr Hunter
I'm in the process of 3d printing an ESB EE-3. (Have completed a 3d print jetpack..will post pics later)... I'm looking for the screws sizes to use for assembly.

I want it to be somewhat functional where it, hammer etc.

Looks like post screws are ideal but I'm looking for sizes.

Any input is appreciated!