This is the CNC I need to get going it is a vintage 1991 Shinx CNC built in Japan, from what I hear it's a top of the line CNC for its era of course. I bought it used for $999 on eBay and it works and was decently maintained.

I need to be sure I can operate the multiple routing spindles and heads as they are pnuematic actuated.
If I go with a DMC-2133 I was told by Galil tech support I'll need the ICM-20105 to go with it. I want to use the metal box to house everything in a nice enclosure.
Would adding a RIO be neccesary? What would I gain by adding one?