Putting Das Keyboard Ultimate S back together

[maTTkOwiCH]

So, I decided to clean my Das Keyboard Ultimate S Model (blank key caps). Unfortunately, I was stupid enough not to organize key caps and now I have ended up with key caps all mixed together.

I am unable to find layout or blueprint which would tell me where to put particular key cap back on. Some caps have markings on the inner side like R1 14, and so on, but not all of them (some only have number like 41, some even lack the marking -.-).

If any of you guys and girls know, how to put this keyboard back together, I beg him / her to help me.

Thank you in advance

[Jack]

I pulled some keys off mine to look. The letter rows are labeled R1, R2, and R3 from bottom to top.  The numbers on the number pad are the same way. The arrow keys are R1 and the bottom row of the block above that is R3. The rest just have numbers instead of row labels. I guess they're meant to go in sequence but they all seem to be the same profile anyway.

[Hyde]

http://www.wasdkeyboards.com/resources/keycap-layout

Here you go, now just try to match all the numbers lol.