Power Supply and Capacitor Questions Help!!

Hello,

I'm in the process of assembling a CNC control consisting of the
following: 4 axies, 3-40 in/lb DC brush type servo motors that are
rated 40v/K at 2500 rpm 13.7 amps maximum current. 1 servo motor for
the 4th axis which I have not obtained yet but will be smaller. I'm
using Mach2 for a control program. Bob Campbell's Sound Logic
breakout board for Mach2. I'm using Gecko 320 drives. I'm using a
power supply from the old control of my bridgeport which has 4 set of
output taps on the secondary and their voltage values are: 1 set at
31 volts AC, 1 set at 10 volts AC, 1 set at 4 volts AC and the other
set read 0. In talking with Mariss at Gecko drive (brilliant man,
hate to bother him), he suggested that I use about 60 volts DC with
his drives. Which would reduce the speed with little effect on the
torque (if I understood him correctly). And I would need a 100 volt
DC capacitor rated at 45,000 macrofarad or greater. I could not
locate a cap with this value and had to settle for 3 100 volt
computer grade DC caps at 15,000 macrofarad. Question: Can I wire
these 3 capacitors in series to achieve the same Macrofarad value? I
intend on using a 1.2k 5 watt bleed resistor on each. Next Question:
Would it be possible for me to run the 31 volt taps through one
bridge rectifier and 10 volts through another bridge rectifier, wire
them in parallel to get my output up to around 41 volts DC? Is it
possible to change the configuration of the primary side and get
higher values? I intend to use the present supply temporarliy to get
operational, then acquire a more adequate supply later. At the 31
volts it appears to be pushing the X axis (servo running directly off
of bridge at 31 volts DC without capacitor and a 2.5:1 reduction)
about 30 inches/min Id like to get it around 70 or 80 inches /min
rapid. Any more than that is unsafe on a bridgeport. Any input on my
inquiries would be appreciated.