Many thanks for all the replies. I am about to hit the road for our winter home in FL and will disappear for a bit.
I will do the reading suggested here and do want to advance my skills with PI.
It is the second time this morning I have come across a link to Berry and Burnell's book on IP. Very expensive but perhaps worthwhile.
'til after arrival in FL . . .
Terry Danks
"PI Novice"
