Thanks Mario D, Oren,Propellerhead and foldy for the response.
I put the crow for two reasons. One is to meet the kvr challenge and the other is specific to what is going on in my country at present. It is election year and lot of crows have begun cawing relentlessly muddying the environment. Now that the track is in the contest, I will let the crow stay for some time. Then will try a reconstruction. Propellerhead, thanks for pointing out the structural weakness. I certainly would like to improve.
Thanks once again to all. Sorry for the delay in responding.