How to put keycaps back on a blank Ultimate keyboard

Because the Das Keyboard 4 Ultimate, 3 Ultimate, and Model S Ultimate keyboards all have blank keycaps, there are no inscriptions to indicate where the keycaps go if you remove them for cleaning. On the inside of each keycap, there is a small number that indicates where it should go. The bullet points and image below outline the correct positions, with the *1.XX indicating the length of the keycap in inches, and the yellow, underlined numbers indicating a bump on the key.

• Function Row: R4
• Number Row: R4
• Top Letter Row: R3
• Middle Letter Row: R2
• Bottom Letter Row: R1
• Bottom Ctrl, Alt, Fn, Spacebar Row: R1

For more information, visit this blog post on How to Reassemble Your Das Keyboard Ultimate.