I visited the premises in Boudha in person. Its not just next to the stupa like many shops but a little way away and easy to find with Googlemaps - just ask locals when you get there as they didn't have an obvious sign, at least when I visited. They have modern studios, workshops and a salesroom all in the same buildng. Bipin was very helpful and I examined several bhavacakra thankas before settling for a beautifully detailed one. The brocade was added in a day or two and the final thanka was delivered to my hotel very carefully and robustly packaged. I was very happy with the thankas I bought and very happy with the service, Definitely recommended!
It should be interesting for you to know that the 1000 arms of Chenrezig represent Chenrezig’s wish to protect all beings in a thousand different ways. A thousand eyes in these hands represent the thousand Buddhas of the virtuous eon. Finally, the one thousand eyes and arms represent the activity of all one thousand Buddhas combined together.