After disassembly and sorting I had to take some measurements.  The goal was to put the clock face in CAD which would allow for me to plan the clock face.  Foolishly I tried making these measurements with a tape measure and I quickly found how inadequate it was for the task.  I borrowed some calipers and I found a mechanical drawing of the LED strip and I was set.  Using my drag knife cutter I fabricated the template and diffuser.

A test fit showed the template was a success but the diffuser had to get bigger. That will have to wait as I am itching to cut and wire.