I've been playing around with Digital Lens Optimizer in Canon's newest version of their DPP software, and am a bit confused about when to apply it during the raw editing workflow.

The instructions on it in the DPP "help" menu say that sharpening should be set to zero before use, but that's about it. Does anyone know if it's best to apply other raw editing corrections (such as color balance, brightness, curve, saturation, contrast, etc) before or after using the Lens Optimizer? Also, any ideas about where the "slider" governing the amount of the Lens Optimizer effect should be set under normal circumstances?

Once the Lens Optimizer is applied can it subsequently be undone, or do you have to make a clean copy of the raw file before-hand in case you want to revert back to the original?

Many thanks for any input.