Congrats on the purchase and project, the results look great. I have traveled abroad with my P67II kit, and I have been to India as well, I think If I go again I will use it ans an excuse to pick up a late model Pentax 645 (same logic as the others in the thread). Glad to hear of a new Pentaxian among us.
Your portraits from India are wonderful! Great job!
The focus lever that attaches to the lens like a ring makes focusing quite a bit easier when using the broom-stick handle. Especially if most of your photos are being taken at a similar working distance.
I would also second johnsey's suggestion of looking at the P645 if the 67 begins to feel heavy. If you do, I recommend the 645N. It is a lot cheaper than the Nii but includes almost all the same improvements over the 645 Original.