MTNU Profile Keycap Gauge

I sometimes struggle to pick out keycaps in the correct profile from a keycap set, particularly if they've arrived in typical GMK style jumble. Particularly for the right column keys like Page Up, End, Delete, etc where there is more than one row variant. And this confusion is increased with respect to the MTNU profile from matt3o and GMK. So I created this MTNU gauge to allow easier identification of which row a keycap is from. So no longer will I have the embarrassment of posting photos with a R3 in Row 4.