Hi Mike,
I too like to use as few points as possible, but our computers have rules they must adhere to.
With fonts, screens must be told which pixels to turn on and off. Printers need to know where to place ink and where to stop. When they get equivocal information . . .
The B-Box for EACH contour (Internal and external) is established by the outermost on-contour point for top, bottom, left, and right.
Any off-contour point beyond the B-Box is a problem, interpreted one way by some appliances, and another by others.
Way back when I first wrote Circle Secrets I didn’t understand this.
I actually made fonts with internal contours with NO on-contour points because I was using Tools / Options / Validation /Global detection - instead of Local Detection. I thought everything was fine.
I had a lot of clean-up to do.