@Daniel_Garcia I’m still happy to help improve the wiki docs if you give me access 
In the meantime, I solved my problem with corruption of secondary panels with parallel output. I naively used a servo cable with 3 wires to send all 3 data signals to my 3 panels, and sure enough, unless I turned the wires and touched things the right way, panel 2 often got corruption, and panel 3 even more.
I could definitely tell it was an electrical problem, and in this case an EMF problem.
I thought about it just a bit more and figured that the code would send a pulse on data line #1, then #2, and then #3. Sure enough, the pulse from #1 would bleed onto 2 and 3, and the one from 2 would bleed on 3.
The best way to handle this is likely to just send all 3 signals over 3 different wires, ideally even twisted pair with the other twisted wire being a copy of ground.
In my case, however, I was able to just fix it by adding a ferrite core and wrapping my cable with all 3 wires and signals around it
Ah, good discovery and solution.
(Your photo seems to have gone missing though.)
Trying again: here’s what it looks like
missing/deleted image from Google+
See it now. Simple. Glad that worked.
This is what I do to get my signals far (ttl) I use the octows2811 method with 100 ohm impedance matching resistors. So far I have pushed signals up to 90 feet over cat5. Not intending to go this far but interesting twisted pair can play nice with the signaling and keep the pixels happy. Each pair is one signal wire and one ground wire.
That’s not a bad approach with the ferrite cores and may keep that as an option for future setups.
Thanks for sharing!missing/deleted image from Google+
You can send the signals much further if you use buffers intended for running balanced lines. E.g for RS485.
For short runs in close proximity, sheilded microphone cable works great.
But regardless its worth remembering that at higher data rates (pattern dependant) you’re working with RF.
@Stuart_Taylor totally, any high frequency circuit is also a radio station 
Thanks for the tips on longer runs, thankfully mine is a simple 1 meter run, so it’s not bad, but without the ferrite I added, even that short run put out enough RF on the 3 signal wires that they would bleed onto one another.
I bet. Much to the joy of local radio hams 
You can’t beat the simplicity of a well place ferite choke.
I’ve just got my order of pcb’s from OSH park to create some RS485 Rx and Tx boards to hang off an Octo board, but it’s a significant cost to the project, in parts and time.missing/deleted image from Google+