I'm certainly not the guy to answer you. But as a non tech who only knows results and not the theory behind a lot of it, i will say this. experimenting with voltage dividers between preamp stages verses using grid leaks to cut gain, i have noticed a huge difference in tone. What you said doesn't surprise me because the difference is so drastic that using a voltage divider in place of a simple grid leak sounds like you turned the treble knob from 2:00 down to 10:00. Huge treble roll off to be sure. Of course i suppose you could always do what they do with volume pots and put a cap across the series resistor. never tried that on a set VD myself but i'm glad you brought this up because i may find that useful. You could even use a trimmer in series with the cap to get the perfect balance. If theres anything wrong with my theory someone please tell me because as most of you who know be are aware of, i'm pretty much the court jester of ampage.