Bit more work yesterday.
The Toyota HD steel tray is pretty good, but one frustration is how short the tie-down rails are. In front of the wheel, very short on the fuel side; over the wheel and in front of the wheel on the non-fuel side, a bit longer; behind the wheel, longest - but none of them fully span the available space.
Since I have installed under-tray boxes that occupy the space the rear set of tie-down rails occupied, I had the two longest ones free - and they neatly spanned the space above the wheel.
The mid-length ones from above the wheel went forward, ahead of the wheels, leaving me with one very short rail (from the fuel side) and one bit-longer one.
Happily, the very short rail fits behind the under-tray box...
...so all that remained to do was turn the bit-longer one into a very short one.
Dock it to length, remove the bracket with a cutting disc; weld it back on. My welding's pretty crap, so it ain't pretty, but it holds.
(I might have to lop a little off the front rail if I can't easily access the fuel filler - it's not as bad as it looks in this shot.)
Oh... and something a bit odd - the mudguards are mounted on a rail with a series of equally-spaced holes. The dealer had mounted one rear mudguard two holes further back than the other...