Thanks for your help. I think I have found out what I was doing wrong.
Mainly, when I select an operation I need to select the face(s) I am processing. I now have found that I have to do this within the operation rather than before I choose it. Now complete loop works and makes sense. I have more experimenting to do, but I think I am on a home run.
Engraving allows me to select the whole shapestring and can also cut to the bottom. But as expected the centre not the edge of the tool follows the text line. Normally I would use a stick font.
Thanks again for your help!!!!