Has anyone here adjusted the 2UZ valve gaps? It uses those little shims like on the 1FZ/1HZ. Valve gap inspection is listed as a 60K mi service item. On the 1HZ/1FZ, which also uses the little shims, gapping is at 60K intervals. The local lexus dealer here re-gaps at 60K mi (I think this involves removing both cams, right?).