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Hey fam, you should probably change that 
00 key to a 
brown R4 1u 
Fn key before the GB starts, because otherwise the 65% and 75% users among your buyers are going to be left without an 
Fn key that they can use in their right column. This is because the nav cluster and right column use brown keys, whereas the only R4 1u 
Fn key that you have in the set is a red one, so it won't fit in with the rest of the keys in the column. Also, the 
00 key in and of itself isn't very useful at all, so this change won't be detrimental.
Edit: Here's an example in another sets that has different colored right column mods:

Ideally, you would have also included a 
red R1 1u 
Delete key for 60%s (example circled in yellow), but it's probably too late for that now...