Camtronics 5A Stepper Motor Driver Board - Power Supply Current Requirements?

I guess I might have just e-mailed Dan Mauch on this question, except that
I know several people on this list have this board and might be interested.

Question:

The instructions that come with the board lists one of the specifications
as ".5-5 Amp Output Per Phase With Two Phase On". If I were to adjust the
drive current to 5 amps for all three motors, and all three motors were
stopped at a half step position, would the total current draw be 30 Amps
(5A drive current x 2 phases on x 3 motors)? Some links I looked at to
understand steppers and half stepping mode:

http://www.doc.ic.ac.uk/~ih/doc/stepper/control2/sequence.html
http://www.ericsson.se/microe/pdf/Industri/app/halfstep.pdf

Bonus Question:

I think someone wrote a message on this list a while back stating that one
of the chips used on the board was going to be discontinued. Is it the
PBD3517 or the PBL3776? What is the plan if any to continue this board
(which I like the looks of and am soldering up now)?

Super Bonus Question:

I'm hoping to use this board to drive the original stepper motors on an old
Bridgeport BOSS4 mill. These are really large motors made by Superior and
also Sigma. I was wondering if any one knew what the correct drive current
was for these. In the maintenance manual they talk about adjusting the
current to 8 Amps, but the original drive circuit was the RL type and the
Camtronics board is a chopper.

Thanks,

Matt Shaver
mshaver@...