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This is a pretty easy print.  While prototyping i printed using both a .4 and .6 nozzle.  The final model of it i printed in petg but early on used PLA so filament shouldn't be a problem. I printed it at .16 layer height but i don't think other layer heights should be a problem.

In addition to your printed parts you will need the following:

16 - M3x4 flat socket head screws

.75 inch elastic

Needle and thread for the elastic

Yes you will need to do a little bit of sewing for the elastic.  This was my first time sewing but it was pretty easy to do some basic stitching.  I will leave it up to you to determine how tight you want your bands.  You just cut the band to the needed length and sew together the ends for the main band.  Then for the back strap if you want that you use another piece of elastic and sew to the main band on both sides.  I would suggest to do it slightly offset from the first stitch to prevent it from being too thick.  Should you want to a money clip band do the same process as the main band just around one of the outerplates to your desired tightness.