I am pretty sure you will be able to fry your modules when trying to combine gates with a mult, switched or not. The thing that he is (ab)using is that some modules might have protection against this. But It's really no good idea to use this as a basis for your patch.
Better go for something that actually does the job. like the Low Gain Electronics Short Bus: https://www.modulargrid.net/e/low-gain-electronics-short-bus-v-3
I'm currently looking into fabricating my own dual or-combiner to go with my muxlicer. I'll start a thread on my progress later today.
-- zuggamasta
Thanks a lot - the Short Bus is exactly what i was looking for!