Update on Zowie G-SR: It never got flat, tried the iron, the text book, leaving it backrolled in the box, and still nothing, Had to change to my old mouse pad HyperX :
Zowie G-SR Para eSports L - Alfombrilla
G-SR-SE ROUGE Large Esports Gaming Mouse Pad | ZOWIE Europe
Alfombrilla de ratón para juegos BenQ Zowie P-SR para deportes electrónicos (pequeña) - Alfombrilla BenQ Zowie en LDLC