I can confirm that rota grid rims clear 4 pot brembos on the front and 4 pot brembos on the rear in the following sizes:
Front
Grid 18x8.5+30
Rear
Grid R 18x9.5+35
As you can see I'm using the BA/BF bracket on the front, if you want to swap or sell me a set of FG brackets I'd be super keen.