I use a cross rack on my BF most of the time. (I actually have two crossracks and can use one on the front and one on the back, but I don't). I have a wire basket zip tied to one of the crossracks, which is the one that I typically use, as it's otherwise hard to have an easily removable basket on a folder. (I used to use a removable rack, but that took too long to remove). The second crossrack is if I want to switch out the basket for a pannier...but in practice I find I'd rather have the basket.

It is amazing how light the crossrack is considering how substantial it is.