My mayo actually worked, so that's not where I'm going. But one tip I'd love to throw out there: DON'T USE EXTRA VIRGIN OLIVE OIL. I used about 3/4 evoo, some macadamia oil and some sweet almond oil, because I read a thousand recipes saying 'don't use evoo' and I was like 'I can handle a bit of evoo'. But no. Even slightly diluted, just no.
And I didn't even use that much oil. But when I make it again, I'll make sure I have a bit more patience (and a lighter tasting oil) so that I can see what it's like when you use all of the oil. I only used a third of the amount.