Hi Michael - typically you wouldn't want to model small bumpy details like stitching in MoI. Instead normally small details like that would be applied as texture or displacement maps inside of a rendering program. Or sometimes applied in a brush-based displacement program such as ZBrush or 3D-Coat.

You can still use MoI to create the base form, but for the deformations and stitching you'll probably want to refine those in a polygon-based program instead of trying to model them explicitly in MoI.

- Michael