A simple model to help with clearances.  This combination should let you test IDs that are at fixed size (ex. 10mm) and see what reduced sizes are needed for a fit.  You can also test an OD that is fixed (ex 10mm) and see what ID is needed for a fit.  My first attempt at this I did not include the sizes of the pieces on the print which made it very hard to keep track of the parts.  This is my first upload.