As for your concern about locking up in a hard turn, if you look at the picture in the ad above the pivot is at the back of the wishbone, so the trailer is articulated behind the bike.Can I ask, how does this act in a hard turn? Does the wheel ever "lock up" because it is at right angles to the rest of the bike, also how does it behave when empty? I have a little Allen trailer, which I love, but it can get goofy if I'm flying around town with it empty. To its credit, it is light and had never planned to be on an ebike.
That way the trailer wheel is always rolling forward and never gets pulled sideways.
The trailer wheel follows the bike track, as opposed to trailers that pivot at the axle which will trail to the inside of a turn.