Shame to see pad printed sublegend on Keykobo when they have tripleshot molding capabilities, but seeing this is in-stock maybe it wasn't available at the time.
If there is still time to make kitting adjustments: r1 End and r1 PgDn should be in the numpad kit since those are for 1800 layout support.
Also you might want to change the font and size for the modifier/spacebar labeling. This one is very small and illegible.