Fun fact: I didn't know that there was a difference between the first and second gen ez30 radiators. The main difference being that the filler is offset toward the engine on the first gen which means it clears the bonnet.
Now I know what the internet was talking about when all the posts said “use the stock rad with pusher fans”.
I've tried it and it fits, so now we have the final, final radiator setup (bonus: see my flashy new hoses).
Next I made some brackets as my brake lines were for the old style shock brackets with a clip. Tidy.
Another recent fun discovery is that Mercedes E class rear abs rings work with the Subaru sensors - well, I get a speed signal at least. Soon I'll find out what happens when you try to use them together with the stock 2015+ Subaru front setup.
More news as it happens (slowly).