Several midi devices, several GCXs and a midi thru box?

[The Blue Letter]

so I was reading that if more than a few midi devices are to be connected together it is a good idea to use a midi thru box. So my question is do I need one in this scenario, and if so where in the midi chain should it be placed? pre or post my GCX units?
Midi devices to be controlled:
3 GCX units
Mesa Triaxis
Marshall JMP-1
ADA MP-1
Line 6 Echo Pro
TC Electronics G Major 2


So that is 8 mid devices and if I need a thru box I was thinking of getting a MIDI Solutions T8. That should do the trick, but out of my GCP should I run to all 3 GCXs and then into the T8, and then into each of the other devices or what? Please let me know if anyone has any ideas Thanks.

[stilwel]

GC Pro connected to GCX1, then you can connect to the T8 input midi input, and fan out to the other MIDI units from there.