I have now created my final Digipak for the band as one of my ancillary products. The following four pictures are pictures of exactly what I printed, all to scale.
The following pictures depict what I did to create the CD case and its linear notes.
To resolve the issue of the visable tabs, I was unable to find a perfect solution, but what I did worked to a much better standard than the previous version of my digipak. I cut the tabs a lot smaller, and glued them to one side of the sleeve so they were more hidden and discreet.