In the end I cut the ends off the protruding bolts. I had to leave a cut out to allow fitting/removal of the tray.



On the nearside I decided to add extra clearance for the brake pipe and union.




Next I lined it with 3mm neoprene to inhibit rattles.

And under the diff plate and brake pipe tube.

Another test fit. The yellow leather straps are for pulling it out!

Finally I edged the flange with Mohair edging, which I happened to have on the shelf. This makes it look really smart.

Test fit of tools:

And in the car:


And that's it. A huge effort. It's the best one of the three I've made. It wouldn't fit Mr Bumble and it wouldn't fit the Roadster. The differences are minor but important. Would I do another in aluminium? Dunno, to be honest the first one in wood was much easier, looking back.
It would have been easier to build a cyberman helmet I think!!!!!
The last four images in the original post are not available. They showed my extra tunnel which allows extra space for the flexi hose, the mohair edging which I applied to the edges of the tray, and the leather coverings which I added to the tool tray swivel retainers........................