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.