I've got sore fingers too, particularly the 3rd one.
My little finger has done quite well today though, and it even nearly behaved on the G string.
I've just played a 2octave D major scale as well (or tried to...). I'm not sure what position I shifted into, but the notes were bang on on the way up - it just didn't quite work when I shifted back to 1st position on the way down because I went too far back.
Glad to hear you've got a list of cello teachers, Barry.