I have braided lines from this crowd on my GT-T, (also using Motul R600 fluid) excellent product! Improved pedal feel heaps. As for the QFM K500's IMHO they are crap. I had a set of these front & rear in my GT-T, I did 2 club days, one at Baskerville & one at Symmons Plains and they where fried to a crisp & worn out! Only done about 6 to 700 km on them. Will never touch them again. The std Nissan pads are better! Never suffered fade on them but the K500's at the hairpin at Symmons, pedal went hard as a rock & straight off in the sandpit!! Not happy!!
Like I said this is my opinion.