my plants are now 4weeks and 5 days (see final pic...

Hey if you are trying to fill a net of a square meter I would get them training in the net spread them out some and gove them about another 2 weeks. Hard to guess on what you will yield depending on how they stretch, but a little training under a net and a couple more weeks can double your yield. Hope this helps! They look great so far. Good luck flowering them!