I was going to use brass fittings, I knew I had them but they were in hiding until the other day when I found them, plastic is doing the job now and I can't be bothered, will stick them in the van for Just In Case.
Plenty of time...................
Your way better than me with the jockey wheel, I just cut the bottom off and welded the plate on but found it jiggled around just as much so dumped it....all the movement was in the windy bit.