Gecko NEMA 42 Modifications - will I need it ??

Good Eve,

I'VE RECENTLY PURCHASED GECKO G201 DRIVERS FOR A BRIDGEPORT SERIES 1
RETROFIT PROJECT THAT I AM ATEMPTING. THE ORIGINAL MOTORS ARE RATED AT
56 VOLTS AND 8.25 AMPS. I HAVE BEEN WATCHING THIS GROUP AND HAVE
NOTICED THAT A MODIFICATION TO THESE DRIVES HAS BEEN MENTIONED,BUT
DO NOT KNOW IF I NEED THIS MODIFICATION OR WHY IT IS NEEDED IN THE
FIRST PLACE. I AM USING MICROKINETICS 75 VOLT - 5 AMP POWER SUPPLIES.
ANY SUGGESTIONS OR WARNINGS NOW MIGHT SAVE ME ALOT OF TROUBLES LATER.

THANKS
JEFF