I started the training by topping at the 3rd node and removing node 1which left me with the base of a 'plus +' shape on which to build.
I haven't been updating and I lost a lot of photos so we are going from there.
So I now have 4 tops. When these grew a bit I topped all these. This now gave me 8 tops that I trained horizontally, evenly spaced apart .
I let these then grow enough for them to be topped again. Now I have 16 mains.
Now time to flip the lights.