looked all finished on 1&2 - stadium was only open to fans upto that point (stands fenced off).
Assume any work on 3&4 is completed as well but cant confirm.
The entry to opening corner is very different, the exit less so to my eye.
Wouldve liked a birds eye view from the stand but that will gave to wait til opening night!
Certainly the difference from the original 300m track before the first changes is HUGE!
Can only be positive IMO.