Interesting. I’ll give it a go. Will defo have a look for that max patch. Monolake is a clever guy. One of the founding fathers of ableton as far as i know.
Expert Sleepers have a jitter free midi solution but you’d have to go modular. Have a look at these vids from Os. First one about jitter free midi

https://vimeo.com/26444600#at=0

and another with Din sync

https://vimeo.com/27001060#at=0

The 2 modules used in the video work out cheaper than an innerclock system. Even if you include a tiny doepfer case to house them in, it still works out cheaper. Your sound card needs to otput either SPDIF or ADAT. All in all this is a far more versatile solution than innerclock. Each one of those outputs on the ES-4 expander could be used to send midi. He also sells those adapter cables too. This lot has been on my shopping list for a while now.