> Hi - If you buy the DIY Kit number 1 (with 2 bus boards and 4
> rails) and then want to add another bus board to make a 9U DIY
> case, can you buy another set of 2 rails to go with it

Yes, but we do not offer single rails. Please refer to our website (>
Products > A-100 > mechanical details). Here you find the address of the
manufacturer.

Best wishes
Dieter Doepfer