This is actually pictures from a testing with 20*30m panels. At first sight, this looks incredible, but here the gras has been joint for 4-5 days. In this photo you would think there is no issues, but when they try to build it much bigger, the weight of the panels are enourmous and need thicker framework etc. If they could use smaller panels it would be easier.
they are facing issues... Tottenham are crystal clear that they will not accept anything less than "perfection", and they need to know this will work for many years...