I have set the step control for my mouse wheel to 500 Hz. and this works well for landing on top of most signals up and down a band but I still need fine tuning for some signals.
Since I have a five button mouse, it occurred to me that a second step size would be extremely useful. When holding the third mouse "thumb" button and moving the wheel, the second step selection would be used. I would set this for 10 Hz. in SSB mode and 1 Hz. in CW mode.