Bill,
Glad to hear you got your bass. Hope it brings you a lifetime of enjoyment. I too had a similar experience with adjusting my right hand technique. So much sound/power right at your finger tips.
As far as the controls, I think I have a lot of experimenting left to do. I sometime just turn the knobs randomly to see what I get, but most of the time I do small adjustments from no specific starting point.
I don't have the superfilter, so I don't have that extra layer of tone control, but I imagine it is worth every penny.
I thought it was a pretty smart idea for you to add the on/off switch for the LEDs. I think if I have my bass refinished down the line, I will add that switch.
Later,
Kevin