So I decided to carry the removable trays one step further.
First, I had some leftover indoor/outdoor carpet from my 4runner sleeping platform project (I'll be posting about that soon). So I cut out pieces to pad the tray bottoms. Seem to fit nicely.
I deferred gluing them down in case during my project journey I find the need to do any drilling on the tray bottom (eg. for hangers or clips on the underside to hold things in the wheel well).
Next I added clips in an attempt to provide the ability to pull/remove the trays.
I'll be honest, for this first attempt, the key split rings seem kinda flimsy when pulling on them. Perhaps there is something more robust???
In any event, the split key rings are ~5/8" I.D., two holes (#32 0.116" bit) per ring spaced ~1/2inch apart.
https://i.postimg.cc/wML1DYGw/Rear-W...-Rings2-25.jpg