At last I have secured a Dr F protractor to set up/check the set up the above arm with the almost " mandatory" Denon 103R
Previously I had used the AN alignment protractor ......Just a piece of card but was unimpressed with the result.

Using the Dr.F I found that the spindle to pivot distance of 222mm was almost spot on but the overhang was way too short i.e. 5-7mm out And this was following AN instructions
It will need checking again to make sure that all is well but the results show considerable improvement

Hooray for the good Dr F