For those who have a problem of ears touching the drivers or not enough seal. I have finally found a solution. The post #12 on this tread http://www.head-fi.org/t/630182/an-even-easier-akg-k550-small-head-mod , I tried it with shoelaces. My ear don't touch anymore the drivers, the seal and the sound seem even better and it doesn't even look as modded.