MRCC: A MIDI Channel to send to all?

[orangeLollies]

Hi Guys,

I feel like I might be missing something real simple? ...But I'd like to know the best approach to allow the following:

MIDI channels 1-15 trigger individual devices, provided they are routed
MIDI channel 16 will trigger all routed devices

eg: 
playing via MIDI port 1 will trigger Hydrasynth
playing via MIDI port 2 will trigger TB-3
playing via MIDI port 16 will trigger both the Hydra and the TB-3

I know I can do this using Channel Map Mod:

Channel Map #1 (Hydra)
Input 1: Output 1
Input 16: Output 1

Channel Map #2 (TB3)
Input 2: Output 2
Input 16: Output 2

However, this will only support up to six output devices, as there are only six Channel Maps available.

What if I have more than six output devices?
Is there a way to just tell the MRCC that MIDI channel 16 sends to all?

Appreciate your feedback ?

cheers
Shane