manganese

Day 64, autoflower, is this ready to harvest? I havent flushed yet soooo. Or is it manganese? I'm hoping I still have 2 weeks to water only.. Thanks!

1st question: can anyone identify the problem? 2nd: should i wait to flip to 12/12 or just go for it? This is my 8th grow but my first in 8 years I have never had these kind of problems and I'm having a hard time figuring it out everything I researched seems like possibly manganese deficiency...

FFOF/Perlite/dolomite 5 gal, 4 weeks veg'd under 90w, week 6 of 9 with 250w (160w high-quality CoB) in 5 square feet H16 base (1-1-3, includes calmag), supplemented by Sea Grow + Hawaiian Bud and bloom (PK boosters), Extreme Serene/Big Bloom (organic stuff). Feed/water every 2-3 days, first half...

Cal/Mag deficiency shown with leaf cupping and brown spots. Using nutrients with no minor elements listed in the ingredients. If this looks like something other than a calcium, manganese or magnesium deficiency, please comment.