Same here Xai with original older firmware 1.27 and 1.36 was the best mouse I've ever used, I was most consistent with it. all day 3k-4k spray downs, 1 taps, triple 1 tap deags, ak hs, felt invincible with it. Watch old clips of zneel cs 1.6 when he used Xai, the mouse made the game ez.
I've owned g303, fk2, za13, dm1 pros, roccat kone pure owl eye. (my current mouse)