This is one view of the custom rear wheel spacer....the H&Rs spacers did not exactly match the brake rotor 'flange' so I had a local shop machine these in 6061T1 aluminum. They are 12mm thick and get my Integrals exactly where I wanted them

Another view of the spacer. Note the lightening holes and the machined hub-centric ring which, at exactly 71.95mm diameter, eliminates the plastic hub-centric ring that came with the wheels
Yet another view of the rear spacers...here the machined hub-centric ring is very prominent
A good close-up of the spacers and how well they match both the brake and wheel flanges -perfect fit