Not easy to offend here but we hate choppers. Now the Tool Box is a doddle...a couple of rubber washers to the shock mounting and two small bolts and nuts to the rear left frame member. Done.
The oil tank however is a complete swine, and opinions are divided between if the designer should have been shot or hung. I think that was too good, and would have burned him at the stake.
The correct kit can be bought from Priory Magnetos on Google..but he opens only a few days a week. He ships anywhere and provides a great diagram of the watchmaker insanity of the oil pipes and oil tank forward mounting.
Even then, I had to make my own lengthened spacer tube for this mount. Otherwise the darn oil pipes nick the frame!!!!
And, use 1 x 3/8" +_ 1 x 1/4" BSP Dowty washer (ebay uk has a zillion) on the rocker feed banjo to shave yourself endless leaks using fibre ones.
You'll never get better advice on this matter..