I have pxc550 and hd4.40bt Storage with sillica gel and always clean after use. 7 month and hd4.40 give sign pleather earpads have freckle and going to crack soon. My question is. The earpads is include in warranty 2 years from sennheiser or not ? Anyone know the replacment earpad for hd4.40 maybe from another brand like beyerdynamic (i have this brand and for 5 tears more and still like new) or other brand which hopefully more durable and larger size (inside hd4.40 a little bit skimp. 30 to 50 mm more space around ear is appreciate) Also for pxc550 if someday it turn as easy to crack as hd series.