Well where should I begin ? I had preditor, Also V22 and never got it to send large files, its GONE now !
with success. I had to copy & paste in V21 and send all day long.
As far as the MX3 goes I don't know the limit, might be 500 events. I have the AGE3 and its 1500 to memory. But I bought a DNC key from SWI and can send endless files.
If you go to program in/out what do you see ? With the DNC key you see the DNC option. Also with the key you can set the baud rate 2400, 4800, 9600, 11200 by running service code 37 (only if you have the DNC key from my understanding).Your question about full 3D is yes if you have the key also !
Without its 2.5 axis move only. You also want to make sure you make no moves smaller than .0002, its a limitation with the controller.
I hope this helps