you should always wait for two things before going 12/12 one is preflowers which you are just now getting and quite slowly since you force flowered the second is staggered nodes and this is what tell you the plant is at full maturity and ready to flower..ya you can flower early but if you had waited for natural maturity you would have little white caps after a week of 12/12. the start of buds forming. also many people believe you can get a much more potent plant by allowing nature to take its course.