DIY balanced interconnects

I want to build some balanced interconnects.
1. Has anyone compared Swithcraft, Vampire and Neutrik XLR plugs?
2. Any comments on Mogami Neglex 2534 vs Vampire CCC-II vs Oyaide PA-02 cables.
3. Should the ground shield on these twinax cables be connected on both ends, only on the source ends, or on the preamp ends?
Thanks for your comments.