Regarding "Sigma Chain" is a good suggestion. I have been using other sites for this purpose. However, I find little problem while in the tab "Sigma Creation". My question is why "Sigma creaion" should not be automatic? I feel and found little proble in creating specific request. The first field "Chain Name". No clarity about fhe field. The comes, the "First Train, Second, Second Train, Third Train and finally the fourth Train". The searchers do not know the link trains. As such, it should be automatic. The train code should appear with all replies.
If my comment is wrong, kindly excuse me.
Jambulingam