I think those Max keys are polycarbonate as they are translucent. In regard to the SP DSA keys... the basic blank set wouldn't have enough 1x1 key for your Windows/Fn so adding one of those DSA WASD would take care of it, or else you would need to locate same color (or other color if you like) blanks in their extras inventory. For the spacebar I know they have 6 unit which you need, but I am not sure the stabilizer mount is in the correct place for your Das. It probably is but I do not know for certain.