Converting old 8mm films

I inherited some old 8mm family movies from my mothers side of the family and want to save them for future generations.  In the past I had converted a two minute film from my dad's side of the family from 1958 using some software and a scanner.  This film had my great grandfather, grandparents, parents and aunt and uncle.  It turned out so well I decided to tackle it again.  This time I had six rolls of film.

Since there were more rolls this time I decided to build some additional components to help me out.  I first built a pair of reel holders out of wood with bolts for spindles.  Next I needed a way to advance the film a precise number of frames for each scan.  The one I built moves the film ahead 16 frames for each scan (1 second).  I also needed a gate to keep the film straight and in the same place for each scan.  The gate was built using a plastic ruler and an old plastic CD case which I cut to form a path for the film with a separate piece to hold the film against the glass of the scanner but not block the light or interfere with the image.