Ok, I've been testing it for quite a while now, in my car. Absolutely great job! I took a song with the singer's voice well placed in the middle of the stereo image, closed my eyes, and started to move it right and left until I centered it right in front of me. Absolutely fantastic! I've been waiting for this for such a long time! Thank you, really! As I said before, this was the only real problem in my car installation, or, at least, the only one i really really cared. Now it is fixed!
Now, trying to be more constructive, I think that yes, if you could eliminate the glitch when changing the delay value it would be perfect. And I also agree very much with the suggestion to separate in car and at home settings. Great idea that about the presets, too. And I would also suggest to add a bar with a slider to give a visual indication of the current cfg. Besides that, it looks simply perfect to me. I did'n find bugs of any sort, and I used it now for a couple of hrs continuously.
Again, thanks!!!