In the article linked below (good read, too) they mention a new adapter for western gas ranges which allows a wok to rest closer to the flames. i assume it is a substitute pot grate which is shaped to support a round bottomed wok.
I think the Viking has one you can get for extra. One of the upper end stovetops I priced circa 1998 did. I don't use it. I crank the big burner on my Viking up very high, get everything ready, get the veggies going in at room temp, make sure any water or broth going in is HOT, and off I go. I don't use any ring, and never have had a significant spillage. blacksalt
