About Angel Sword Forge,
The weapons they make are made of "Living Steel" which has a magnetic field extremely similar to that of a human being. The forging of living steel causes the molecules to "crystalize" into one single unit so the blade is extremely strong and sharp.
So feeling the broadsword with your eyes closed was only the interaction of two magnetic fields, the human's and the swords. How we feel something enter our magnetic field is beyond me.
Try holding the tip of a butter knife half an inch in front of the top of your nose centered between the eyebrows. You will feel something. It gives me a headache.
There are a plethora of theories as to what ki is, but most everyone agrees that training 'ki' will help your aikido.
Good luck in trainin.