Load Check tool?

Hi again,
I've been scanning this forum and it looks as though there was a tool that allowed you to see how many seats were available in each class code for a given flight. Am I right in thinking it's not working now? I'm planning my next family jaunt to Dubai in May (VS400 on the 26th May, returning on VS401, 2nd June).
Ideally don't want to have to book right now, but see there are some nice cheap O code flights both ways - is there any way I can keep tabs on availability in case it does start to get booked up?
thanks
RC
I've been scanning this forum and it looks as though there was a tool that allowed you to see how many seats were available in each class code for a given flight. Am I right in thinking it's not working now? I'm planning my next family jaunt to Dubai in May (VS400 on the 26th May, returning on VS401, 2nd June).
Ideally don't want to have to book right now, but see there are some nice cheap O code flights both ways - is there any way I can keep tabs on availability in case it does start to get booked up?
thanks
RC