thank you for the reply. i was going off the post regarding the goals of the mod on page 5. what's problematic about my treble issue is that it is only noticeable in one of my ears. i am also using sonarworks which has given me a much more pleasing sound overall, but at times that peak still shines. i've got the SDR mod. my dust covers off. magni 2u/modi2u as amp and dac. i've heard the new multibit model might help some. looks like the cork mod is something you have to do on your own and not sold anywhere. i'll give the TP trick a go and see what happens. again, real annoying at times since it's only in one ear. the other ear sounds wonderful! much appreciated for all the input.