I own a lot of razer products. I bought a firefly 2 weeks ago, and within 2 weeks i replaced it twice since is not flat whatsoever. First one made really mad scraping/scratching sounds and i had it replaced. This one is cool but not flat either. Are there ANY firefly flat? Second problem. I got razer mamba te for 1 week. Using it on firefly for massive gaming over the course of one week, my mouse feet got really destroyed by firefly, and now when i glide my mouse over the mat it makes scraping/scratching sounds. Should i replace mouse feet?