yup i totally agree that autos are meant to run not in 12/12. but if i would need to switch plants to flower and would not have extra grow room for auto, i would sacrifice it for the sake of two others..
be careful, do not overveg ur plants, make sure ull have pots to support whatever size ur going for. like i vegged for 7 weeks instead of 5, because of lanky skinny stems i harvested even less than on a 5 weeks vegged plant. and also had a lot of problems and deficiencies.
look man hows the unknown? for me it looks like its ready to be topped. whats ur treatment plan on it?