(I'm using them with the Mod Kit) I don't know why, but I can't play properly with the Astro A50's. When I put the Astro A50's on my Head, they often feel very weird and not comfortable and I have to take them off again and then do them on my Head again until they sit "ok". And when I'm finally ready to play with them, I can't move that much, and if I move, they feel uncomfortable again. I tried every size already and the sizes are both on each size, and I already tried to have a bit more one the one side just to try it out. Maybe they just aren't good for my head form or something?