O-line faces tests against Seahawks and their fans

* * * Coach Mike Singletary was asked to describe the difference between the Chilo Rachal of September and the Chilo Rachal of now. Here's what Singletary said: "Maturity, experience, working together, relationship. I mean it's huge when you talk to that guy and you trust that guy. It's one thing to say, 'This guy does that and then you and I have to switch off,' and when that call is made you have to make sure that you have each other's back and I think that's a work in progress. "That's why the offensive line anywhere in the league, if they are a good offensive line, chances are they are very close. When you see one, you are going to see all of them and I think our guys are just continuing to gel, continuing to spend time together and watch film together and do all of those things. Now, they also have to interact with the quarterback as well because they can do a great job here, but if that quarterback is stepping right where h...