Query regarding transfer of articleship.!

Hi friends..

 Please resolve this query of mine.

I am an article serving second year of articleship with one among the big 4 in Bangalore, India. However I want a transfer to my home town and would like to continue the remaining period of articleship in a mid sized firm as I strongly feel that I need the experience of working in a relatively smaller firm and to learn the nuances of the same. 

Since ICAI permits transfer of articleship beyond 1st year only on specific grounds, please suggest how can I go about the same. I am all confused regarding how to proceed about it.