I managed to get the drivers installed and the Visual Basic 2010 example coding running on my PC and demonstrated that I could drive a small test servo from my keyboard.
My old ATX PC power supply seems to be able to handle the test servo without a lot of bother. It is rated at 30 amps, so with luck I won't have to do what Gael did with batteries and a charger just yet. In theory, this controller should be able to handle the whole Inmoov robot. It will certainly handle one arm, I hope.
I order the HS-805BB servos. They should be here by Friday.
Just discovered a spool of 250 yards of 8 lb monofilament. That should work for the hand.