I am going to brew a vanilla bourbon porter tomorrow or the next day ( hopefully) . I am going to rack it onto a yeast cake from a centennirl blond I have in primary. I am going to rack the Blond to secondary then rack the porter onto the cake, The question I have is how long is the yeast cake usabler after I rack the blond off of it? Can I do that tonight and brew tomorrow as long as I keep everything sanitary and sealed up? or do I need to time it out to put the blond in secondary then put the porter on the cake pretty quickly?