4th Position

I know a little theory so that's a good thing though there are times when a little knowledge can be a dangerous thing!

If we follow the circle of fifths clockwise I can see why playing a C harp in G is called 2nd postion and why playing it in D is 3rd position. That would lead me to conclude playing a C harp in A is 4th position. I understand all these possibilities are actually modes of the C scale which give us different types of major and minor scales depending upon where the whole and half steps end up falling.

That would mean we can play A harmonic minor on a C harp in 4th position. The only bends needed are the low end root at 3" and the 6th at 2". At least I hope that's true!

My minor scale playing in 2nd position sounds awkward. The bends aren't significantly different but perhaps where they show up in the scale, and the importance those notes have to most melodies and solos, makes them more critical and therefore accurate bending is more critical?

Do you use any of this in your playing? Thanks