I was outside the 10 mile ring on the plate

I would first point out that that the 10 mile ring is irrelevant. The
ring depicted on NACO charts is NOT the procedure turn area. It
merely says everything is to scale inside the ring. Common
misunderstanding, but an instrument instructor should be slapped
around if he teaches it.

The only "10 nm" that comes into play is the one on the profile file
that says "remain within 10 nm". The protected area for a PT is NOT
a circle; more like an egg.