i top/fim once the clone has 4 nodes. then i continue topping almost all the secondary growth shoots as well for the next 6 weeks. i stop topping 2 weeks before i switch to 12/12. this is a clone that has been topped and lst'd starting a week after it rooted. it is still very young (3 weeks or so)

the second pic is a new technique iv'e started. i take a clone from the middle of the branch as well as the tips. these mid branch clones start growing at least 2 main tops right from the start even without topping. i hope that makes sence the way i explained it