This is a great review! It's thanks to reviews such as this that I became interested in Indian pens. The ASA Nauka (which means "science" in Polish), is an elegant pen, indeed. I wonder how my grip would do with the threads being close to the nib. I'd have to try it to see if it's comfortable without my finger slipping on to the threads.
I have a question for you. I have an Indian ebonite pen with a Jowo nib, and I found that, with the converter, the flow is moderate (5/10), which is to be expected because it works for most people. However, when used as an eyedropper, the flow improves at least two points (7/10), possibly three. I wonder if you have had a similar experience.