I forgot to mention that with the Mazdatrix adapters (never figured out the real manufacturer - Earls or Areoquip) but they are steal and narrow... So I hogged them out to 1/2" myself
True AN seems to be the only way to go even though it adds up $
I usually go to Kennesaw to a place called Fast Lane that specializes in dirt track cars. A mailorder warehouse that carries most all the Aeroquip stuff on the rack.
Dave (or anybody interested) give me a call straight to my cell at 703-609-2642 as I am never home to get any messages.
Take Care,