The biggest problem with scratchbuilds is if there's something wrong there's no-one to blame but yourself!
I found I incorrectly measured the angle for the tray - I measured 22 degree slope, whereas it's actually 12 degrees. Oops. Fixed now.
(Pic)
Started the tie-downs that run under the outside of the tray. These are vertical pieces of circular section rod on the 1/1 subject & come in two flavours; full & partial. 'Full' run top to bottom of the rim, whereas 'partial' run from the top for shot 4/5 of the gap. I guess they're for hooking running pieces or rope under? In 1/16, my eye puts them a 1mm rod.
To insert them, I drill from the top straight down. 'Full' requires a mating hole in the bottom of the recess:

Then inserted a length of 1mm rod. For 'partials' I used the back end of a #11 blade to maintain a consistent gap.

Once glued & dried they were flush-cut & sanded back.
More to come.