I should also mention that the uniformity portion to get these numbers was a little different for me than what was shown on the tutorial, it would flash white, med grey, dark grey and then give me 3 numbers (where yours only had 1). I used the top number with the highest luminance. The 3 numbers were not wildly different though, within a couple hundred of each other at most.
Yes - I started with 5500, then tried 5000