Don't think they would now change the specs a bit..... they are not that dump. In modern warfare, there are constant upgrades. We never know until this is tried out. So Russia wants to sell a weapon system that never seen warfare? Who wants it!! Change a bit that Israelis/US does not know...then kapoong a winner in world markets. Anyway.... the S300 is the minimum Syria needs to defend itself and Israel will be baited to destroy it....
U.S. says it killed 10 AQAP Islamist militants in four air strikes in Yemen since April 23 (Reuters)
from the article: Russia’s dubious air game in Syria