Well - I would say start flushing in a couple days. Do a nice thorough 5-7 day flush starting on day 49. That way, you got a good 8 weeks in before you chop so they should be fairly done but not too done. WW takes a long time - like 8-10 weeks but the NL is shorter. The 8 week mark should put you in a good spot. BTW - I am not an expert but I think you will like the results. I like the more sativa type high also so I pretty much start flushing at the first signs of amber.