I use at least a instance of Wider from Polyverse on every track I write to quickly move things to the edges of the stereo space. This particular plugin allows you to push stuff up to 200% wide, hence the name. It does one thing, and (fwiw) it does it well. But as for other VSTs I use very often I hate to deal with floating windows, so here's a controller.
The first knob toggles the spectral spread from 0 to 100% while the second one from 100 to 200%. Because it seems there is no way to set conditions while programming a Combinator I could not lock the second knob if the first isn't at full 100%. Too bad, but still, this is a plugin I use on a daily basis and I wanted to use it rack-wise. I thought it would be nice to share.
Requires Wider from Polyverse (free)
Have a nice day!
