In an old post, Don Peterson wrote:
"Clean sounds tend to have most of their energy in the attack, which lasts only a millisecond or so. The profiler has a few neat options to dial down the attack:
- Put a Soft Shaper post Stack and use it as a saturator (very low drive setting)"
I found this also works on dirty sounds too. It doesn't make an audible difference, but it adds a noticeable and lovely feel to any rig IMO. I set drive at 0.5. It's like changing string gages down two sizes!