just got my T1 back! they replaced the entire headband, my old one was the 5k series, this one is from the 11k series beyers. seems like its a little wider, the leather is softer,and the sliding mechanism is nice and solid, it doesn't move all over the place like the old one, it actually clicks into place like its supposed to!
peter and the entire beyer service team are awesome!!
Have fun with them ^^