This rackspace is created by Claudio Krott and it includes a script with which you can store two different drawbar settings and then morph between those with a fader (or modwheel). Pretty convenient, if your midi keyboard has no faders.
// The script is based on the “Relative movement” by @schamass!
There are two sets of faders, so the A and B positions get stored permanently.
You still set the positions with the main faders, so the small faders can be hidden - but can also serve as a visualization of the settings.
Download: Organ Morph Script - Positions Stored.rackspace (613.1 KB)
(source)