This is an updated version. 5V is normalled to input 1, meaning with nothing patched into the first input (top-left) the DC voltage will be present on all inputs/attenuators. The linearity of the attenuators has  been drastically improved.

Distribution is a buffered multiple, with two buffered outputs and six attenuated/buffered outputs. Inputs and attenuators are on the left, and outputs are on the right. The top section has a normal connection to the bottom section. Patching a signal to the lower input (left middle) will break the said connection.