Thanks Wes!
I had need of this just yesterday, when I wanted to use some Substance materials in a project I'm working on atm.
It works like a charm. Just add the substance, hit octane render in Modo, bam! no fuss.
One thing that did occur was, for some reason.. (maybe my system?) the old 2.1 Substance plugin was not deleted from the Modo configs. I checked the version installed and even after the installer had finished (no PC reboot) Modo listed the 2.1.0 level plugin only. (I didn't try to run modo.) I looked at the install folder and yeah, it was still there along with the 2.4 version. I just deleted the whole 2.1.0 version folder, I guess that's ok? Whatever, Modo now sees the 2.4 version and it works great!...(admittedly, I've only just started to get the project onto Substance mats..)
Cheers!
Gary B