sure, once Ive figured exactly how I'm using it, still experimenting a bit
I also plan to do a video...
my plan, and what Ive done so...
I view eurorack 'space' as expensive (compared to AEM, due to cases/power supply),
so I got an 8U, and added the following modules:
master, 4io, 2osc, wasp vcf, 2vca, env, lfo
the idea is :
have a complete voice , but more importantly parts that could be used by the rack (as ive 6 CV IO),
also I can use it as a 'bridge' to my proper AEM modular (2row)
whats also useful, is my eurorack contains mescaline and field kit which also have patchwire 5v IO, so I can interface to these modules directly.
yes
my eurorack setup is a bit 'all over the place' at the moment.
the field kit fx, gives me FX which I use for AEM (including a spring tank).
on the eurorack side, I currently lack sound sources, filters, modulators … so I want to use AEM to provide some of this.
(hence the 4IO)
so far ive not seen this, but generally this is because of tended to patch directly into the 5v from mescaline, then just audio out from AEM (either my AEM modular or the AEM eurorack … (hmm, wonder how I should call these, terminology is tricky here
)
I think the 4IO and Master will do this, and suspect this is what the difference is for audio vs cv on master, and the audio/cv switch on the 4IO.
one thing, im still a bit undecided on, is long patch wires...
bridging from the AEM modular to AEM Eurorack requires a bit longer cables, so ive been using extensions (forgot to order a pack of the newer one piece one!!),
but perhaps if they are longer, I might be better to get another 4IO and use (longer) eurorack cables.
I think this probably will come down to how many signals Im sharing ,
so far whist experimenting, ive tended to view the 2 things as complete systems, then just share sync, and pitch signals...
I'm also consider another DIY approach
the idea is a create 2 modules which have (e.g.) 10 IO, and a ribbon connector, I put one in the AEM eurorack, the other in AEM modular, then use this as a 'bus'.
I think this would be pretty perfect, easily able to connect, with only one ribbon cable, that could be pretty long without be messy. (think 1-1.5m)
I guess (as ive not seen it) this is like
robertlanger rack link, but without the power line...
perhaps
robertlanger, you could make this configurable for rack link? (a jumper on the back would be fine)
) 
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