Well it was downhill, and I had a bucket hooked over the ladder. On another hill on the way back I hit 29mph (only about 3mph pedalling UP that hill earlier though!) and it didn't weave. Turned out I had lost my bucket.

I am very impressed with the way the trailer tracks, I barely know it's there. I guess the hub mounting and single wheel work really well for that, but I see why Bob make an Ibex - like a Yak but with suspension. Maybe if I'd spent £280 (instead of £125) I could have kept my bucket.