i am not sure how he did his car, but i put 25 mm spacers on mine to see where the wheel will sit, and i think our stud are about 28 30mm. which mean you would need either longer studs, holes in the backs of the wheels, wider adapters, or the cut down the studs to be level with the adapter.
the last options sounds bad, but its as "permanent" as going with longer studs. the difference is, when you are "done" with the need of the adapter, you can pay to stock studs back in, as opposed to pay to put longer studs on to run the wheels. It is really just about when you want to do the work.
(please know what you are doing to cut them down though)