banner sensor positioning and times

[bob1million]

My team has been working on getting the banner sensors to work and we where wondering two things as you can tell from the title.

1. How are other teams positioning and how many banner senors are they using?

2. How long is it taking them to get to the ball?

Right now we are having problems even guessing if our design will work because we must use lost years bot which is completly different from this years.
We are using three sensors one about three inches in front and on the line while the other two are on either side of the line. Last years bot has costers on the back and we are thinking that the backing end is swinging around farther than this years four wheel drive bot will do and it does not stop on a dime like this years does. Hopefully any input will help us to determine if our way is going to work or if there is a better way to do it. (steps off box) Thank you.