Glad to help.
I've been doing Norfolk research for quite a while now, and since these records came online last year, have found out more than I did in the ten years previously!!
As well as the Parish Registers, you can sometimes find "missing" things in the Archdeacons Transcripts or Bishops Transcripts, many of which are also online.
Going back to your Susted Abbs family, I've looked at another site that I use a lot, and I think (and hope) you'll be able to find out a bit more about them. Seems there were Abbs in Susted going right back to the mid 1500's!!
If you type Abbs in the search box, and click on "All collections" at the bottom, a long list of results comes up - I've had a quick look at those in the Norfolk Record Office, and the Probate list. I noticed Zachariah is an Executor in a few of the Probate records. He was obviously an important and respected member of society.
Have a look - it takes some "going through", but as the Wills/Probate documents are actual images of the documents, it's worth the effort!
http://www.noah.norfolk.gov.uk/QSearch.aspxBest wishes,
Yorkslass