HiDiamond Speaker Cables

Even though I own all HiDiamond interconnects and power cords, I have maintained my DIY speaker cables that are made out of pure 9999 silver 14 & 18 gauge soft annealed wire.

I would be very interested in opinions of the D8 speaker cables from those of you who have them.
For biwire, do you have 2 separate runs or are you using jumpers?