After 2 weeks snip across the first top and after 4 weeks snip those 3 tops again the just put it straight into 12/12.
In the future though im just going to be growing lots of single stem plants as its less hasstle.
When i snip the tops and always leave a tiny bit of it left this gives me 2-3 tops instead of one on the first snip and i then a week later snip all 3 new tops in the same manner,you don't have to wait until they are big to snip them,in fact its better to snip them when they are fairly small with clean sharp nail scissors.
Im pretty stoned right now and its hard to wrap my head around wether i make sense or not lol