Thanks CML... OST has covered so many groups of allied ragas. Excellent.
I wrote above that I once mis-id'd a Vachaspathi song as Harikambhoji. After listening to OMT, I realize my confusion is quite shameful

There was that only that one occasion, I will have recall which song it is and lisen to it again and sort out the source of the confusion...
I am still not clear between chakravaham and Ahir Bhairav. OST says Ahir Bhairav is a lighter version of Chakravaham. I do not have a good mental identity for AB but when I listen to AB it does not take me close to chakravaham.
His Arabhi-Devagandhari demo is excellent. I am not sure too many people confuse the two since they have distinct personalities but it is nice to have it recapped succinctly.
Minor complaint: In certain parts it is a bit confusing which of the two ragas he is singing since he sometimes labels the raga before and sometimes after. So, consistency of presentation of material would help the listeners.
OST has provided a trasure trove of artitistic content in that one hour.