Today I got into the brakes, and machined the pad slots an extra 4 millimeters or so, this was enough to get the pads to line up on the rims, and now the brakes work well. An odd problem I ran into was the tires, which I think might be counterfeits. They have high and low spots, as much as 10mm out-of-round. I didn't notice it much yesterday as I was running the pressure a little low, and thought that I might have goofed installing them. But after a careful look, checking the tubes, removing, and remounting the tires, the rear has a noticeable bump, and the front looks like the tread isn't adhered staight. I got these online in Japan, I guess $40 for a brand-new pair of Panaracer Gravel King Slicks was too good to be true. Of course the seller has vanished, so there is nothing to do but buy new tires.