can't reach 5v with R2R DAC

Yes I have only 7. I followed that tutorial but then I realised i'm fine with 7bit.
I was checking again but they're all in order. I measured the total of the 100k resistors plus de 200k to ground, and I got 800k. Also I checked the resistance of each output. I was hoping that my eyes tricked me. Red and Brown are very similar on metalfilm resistors. I'll check again though.
I can post a pic of my protoboard is needed, thanks