Howdy to the Forum; our group www.veteransinitiative.com a 501,C-19 non-profit is re-fitting a 3 axis Monarch VMC-75 with a Gettys N-150 thyristor amplifier. the servos are beefy & all the MOSFET & IGBT amp mfg'rs would not warrantee them. we are sure the N-150's will work fine. we are planning on using the Servo-To-Go board (4 axis, +/- 10 vdc) with the Gettys analog control cards. the original drive was a Bendix 5M which outputed +/- 7.5 vdc. we also wish to incorporate the EMC 2 with a cad program. this mill is destined for our school to teach mfg tech to our most deserving citizen, our DAV's so they may obtain career jobs in mfg. all of us involved are Veterans belonging to AL,AMVETS,CWV & MCL. any advice would be most welcome. may God protect our valiant warriors, Dominic.