8 Weeks of flowering. Spotting and curling leafs

Hi all!

I'm in the 8th week of flowering a plant from bag seed. It's a indica or indica/sativa strain.. don't know much more than that.
It's been going all well, but little over a week ago the leafs (specially on top) are starting to get spottet and brittle.
I flushed a little before that, so I have been thinking thats the reason. But is it supposed to go this bad?
Initially i thought they would go yellow from nitrogen def. But now the plant is showing both P and K def, but not much N def.

Does P and K def affect potency and final result, this late in flowering?

The trichomes are getting cloudy, only spotted a few amber (maybe 10 on the whole plant). I hope to harvest in a week or so, max.

How long has this problem been going on? - Started about 10 days ago.
What STRAIN are you growing? - Some sort of indica or indica/sativa.
What was the establishing technique? - Seed
What is the age of your plants? - 70 days (56 days flowering)
How long have they been in the soil mixture they are in now? - about 65 days.
Were they in the same mixture when they were seedlings/smaller plant? If not, what mixture were they in before? - Canna Seed Mix
What PHASE (seedling, vegetative or flower) are the plants in? - Flower
What Technique are you using? (SOG, SCROG etc) - LST
What size pots are you using? - 6,5L (1.7 gallons)
What substrate/medium are you using? - BioBizz Light Mix
What brand Nutrient's are you using? - Advanced Nutrients (Grow Micro Bloom PH perfect, Hobbyist bundle)
How much of each nutrient are you using with how much water? - Started with 1/4 of recommendation, slowly up to 1/1.
How often are you feeding/watering? - Every two days (alternating water and nutes), now only water (started flushing).
What is the TDS/EC/PPM of your nutrients used? - was 1500ppm, now 150.
What is the pH of the "RUN-OFF"? - 6.7
What size bulb are you using? - CFL 250W, 2700K
What is the distance to the canopy? - 1/2" to 1"
What is your RH Factor? - 40%
What is the canopy temperature? - 25-27C (77-80F)
What is the current Air Flow? - Swithces air every 3min
Is the grow substrate constantly wet or moist? - Dries up on top before every watering.
Is your water HARD or SOFT? - 0.10 EC
What water are you using? - Tap PH7, EC 0.10
Has plant been recently pruned, cloned or pinched? - Pruned dead leaves.
Are plant's infected with pest's? - No

Thanks again, for an awesome forum!

BUMP

Nobody have any thoughts?
What do you think about harvest time? To early?

Looks done, and I wouldn't want too much amber either. I'd also be happy with a 7 day flush, so sounds like she might be ready to KILL.

Looks very close to me, I would start to flush for ten days or so and pull her. Buds look great an you post a close up of bud only?

looks done to me ,start flushing

Thanks for replies!

This is the closest I get with my crappy lens (no macro function).

Looks delicious! Flush and chop!

yea,they basically look like they are dying in the end,which they are are ,weed is an annual,only lives once in nature.....also 1500ppm is kinda high ,I find my plants look best at lower ppm,Im doing hydro,some say they go that high,but I like em around 1000 ppm,I guess if you have 6 ft trees,1500 would be fine, it depends on the strain though , they do look like they had some nute burn,but should still be good smoke