Just what I plan to do --- I have to visit the leather shop to do me some thicker version of the pads. I even tried to simulate an angled pads a la K701

I've already used some fiber fill but it's still not enough... will try foam. Resonance... plastic should be dead, right? If not, still it doesn't have a good sound

But I will try to tune my pair without TP'ing them

So far so good.