I grew AK47 last year and am doing the same again this year, I tried to FIM last year but I missed and topped them, I've done the same this year and I know that 3 of the 4 plants have FIM'ed ok (have 4 shoots). I don't know if its gonna stress them into being male or not yet but last years topping produced 50% M/F which i guess is right as I never bought feminized seeds.
my temps go quite low and a couple of occasions the lights went out for 12+ hours when supposed to be on (having wind as primary energy has its downfalls) so to sum up... AK47 does seem like quite a forgiving/hardy strain in my opinion.