Cam phase suggestion advice

As well I put together an 18 inch 360 degree wheel for better resolution. The small 7 or 9 inch wheels are too small for my eyes!
I've the TDC to probably the most accurate an engine can get! The delineation of the hatch marks on the wheel are so far apart now, I can read to the tenth.
This is a funny story though: Earlier in the week I went at the whole cam timing setup and the numbers on the dial indicator and degree wheel were way out of whack. So I redid the setup...same thing. Then my son pointed out that the indicator I was using was in Metric. Time for bed I said!