Scott.
I do use this feature with the SD1 from time to time. This is a feature used within PROGRAM VOICES (a group of up to 4 voices). In this case 2 voices are assigned to a program (eg V1 & V2 - let both voices be Hawaian guitar). In the program menu, there is a function (Steel) that triggers this event. During playback, when the pitch bend wheel is bent while playing at least 2 notes on the RHS of the keyboard, the lowest note is bent. The effect's default is set at V1 but this can be changed.
Hope this helps.
AJ
PS: I'll try and make some MP3 & MIDI of such and send for you to share with others.