I am about to keg 10 gallons of a Grisette (4.5% abv) and I want to add Brett to the second 5 gal corny. The Brett that I have is WLP645 and it "expired" on 10.21.2014. I want to stress the Brett out and get a nice funk, but I don't want to ruin 5 gals. Should I use some Crooked Stave dregs...