Brompton mini racks - How do you use them?
 

I've noticed that several of the aftermarket rear racks for Brompton look generally smaller and less substantive than the stock rack -- e.g. on eBay, one can find the "Q type" rack and the "Ti Parts Ultralight" rack. That sounds well-and-good for reducing weight/space...

But I'm a little confused about functionality - what can you carry on such a small rack? With a larger rack, it seems plausible to use bungees / straps / zip-ties to attach (say) a dry-bag, a small duffel, or a milk crate. What fits on a tiny rack?

Not for carrying stuff. For smoother rolling in shopping
cart mode. Especially E type; no fender wheel.

For carrying things; use front luggage system.

OK, that sounds handy for a commuter.

If you're traveling and need an extra 10-20L (beyond what fits in the front or on your person), then I guess one should go with the standard rack...

Mainly for rolling in cart mode.

sometimes I tied small messenger bag (8 inch tablet size) with rubber strip. I think it is not possible to used with larger one than that.

Curious how a shorter rear rack makes rolling in shopping cart mode easier. Turns can be done without pivot lifting?