Hello,
The new version of vArranger allows you to control your VST instrument from your MIDI controller.
You can assign any parameters of your VSTi with a midi fader, knob or button.
It is very cool if you want to play an Hammond clone VSTi and control the Drawbars, or Leslie. etc...
The MIDI controllers are smartly shared between all the VST, depending on the VST you are currently playing.
The second good news for NOVATION SL MKII, I have added a led feedback, so buttons and knobs leds ring are in sync with all vArranger features and VST current state.
You really feel like playing a hardware arranger
By the way NI B4II or VB3 are cool VST for organ
You can load KETRON, YAMAHA, ROLAND, KORG styles