I finished the brackets and would have finished the whole job if I had the nut / washer / bolt sets I'd like already.
Then when it was time to remove the skirt, it was such a snug fit, it resisted. I decided it was better to leave it on and temporarily wire bind the missing fastening points until my trip to Bunnings on the way back from work tomorrow.
So here are the brackets:
and here is the skirt supported by the can and mouse mat:
and here is how I'll drive to work tomorrow
: