nice mate, those crowns are starting to form hey.
youll work out the space issues in time, its actually amazing what you can do with some imagination and an empty tent.
when you upgrade you can use that tent as a veg tent for around 6 plants comfortably, bang 2 CFL's up there and then you can have the bigger one for flower next time.
anyway goodluck with the rest of your flowering, frost it up