This is possible. Realize that Studio One doesn't recognize the buttons as a default because Studio One doesn't recognize MIDI notes as buttons. If you use the malletSTATION editor to change the buttons to CC messages instead (I recommend CC 22,23,24,25 on the 4 buttons), then those buttons will be recognized. You then have to set up the buttons and faders in Studio One. I've found this video helpful for setting these types of things up. Realize you'll need the plugin window open for any controls to be active.