You can unbolt the 591 main clamp (x2 allen bolts on the underside) and slide it back to fit a longer wheelbase and make use of the rearwards unused tray space.
Yeah, the Thule manual gave a dimension which wasn’t to be exceeded with this though, and mine was already at that from the factory but I can’t see what ill can come of pushing it a bit, as I have.
You can unbolt the 591 main clamp (x2 allen bolts on the underside) and slide it back to fit a longer wheelbase and make use of the rearwards unused tray space.
Ignore me - just read you've done this