Had a gal bring her bike by for me to look at. It had one of those cages on it and we noticed it was cracked where the cage attaches to the flat mounting plate. It turns out these are these are thin stainless steel tubing, so I cut the heads off a couple nails, slid them into the tubing to brace it and silver brazed it up good as new. Maybe better; it shouldn't have cracked in the first place.