? on reusing a yeast cake

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?

i've saved a yeast cake that long with no noticable ill effects, for what it's worth. I guess the only thing going on is that the yeast is exposed to O2 for a while. No prob, right?

That's my thinking anyway.

I've usually racked right before pitching. That way, you know there won't be any issues from storage.

I've kept cakes for up to a week in the fridge before pitching. Any longer than that and I make a starter.

GT