Spin on oil filter mounting

[Erich]

When I first bought my Ulster Rep, the spin on oil filter was mounted on a plate which was bolted onto two of the head bolts. When I had work done in the UK, it was moved to the single bolt holding the filler tube on to the crank case. I have wanted to change to another more solid configuration and have looked in Gould's book on building Ulster Reps. But for the life of me, I can't visualize how his mounting works. Does anyone have photos of his system? Any advice will be very much appreciated.

Erich in Seattle