I bought my Saphira 3 months ago. It's really greate mouse with epic sensor and switches, but i have one problem. In some positions scroll feels loose. It's not totally loose, it's like half milimetr space that scroll can move to left and up, so in fast movement it wiggle, do some noise and you can acutally feel it when you move mouse mid-air. On other steps scroll is rock solid and you don't feel any loose on it when move mid air. The steps don't change it always wiggle on certain spots, so i can scroll forward 3 steps from good position, it will go wiggle, and then go back 3 steps and it sto