PODfarm and Digital Performer

If you've been trying to use Line 6's PODfarm plugin with MOTU Digital Performer 6.0, you know there are GUI issues.  The virtual knobs freak out if you try to use a conventional mouse-over grab 'n' go.  But there are two workarounds.

If you've got a scroller ball on your mouse, that will do the job.

If you've got an older mouse or a broken scroller ball, just click and hold over the knob you wish to adjust, add the shift key, release both, use your mouse to adjust the value using an up 'n' down mouse stroke, and click once more to set the value in virtual stone.