You do not have 7 gallons of "old lambic" you have 7 gallons of probably a year of being YOUNG lambic. Gueuze is even more distance from what you have....by many years.
Sours are a patience game, we talk in half year primary, years of bulk aging, years or bottle conditioning....not weeks or even months.
Leave it alone. Pick up that book linked above, ask questions, Google your heart out. But mostly, leave it alone :-)