There are several versions, but I like the 4 Part version, and use 3 Channels of MIDI.
Anyone who is getting XITE-1 will eventually realize that this beast is a must have.
What makes this monster so cool is I can use Adern's Flexor RDII Modules, JBowens RDII Modules and last but not least SpaceF's Satellites, which are extreme.
The Filters and Oscillators from SpaceF are top shelf.
I happen to like the multi waveform ones shown below.
Most Oscillators have 1 or 2 waveforms and specialize in a certain sound structure, but these are insanely obese.
MetaOsc's are 5 x Waldorf wavetables in 1 Oscillator..........

Enough said, here's a taste of a 3 part MultiSynth preset where I push Bass and play chords.
Using a dual instance of MoBass gets things really FAT in the low end, and the top is just sick with LFO modulations and waveforms curling up and down.