Thanks printbus for all the info. I'm happy to inform that I finally manage to solve my banding issue. . I bought a 3/16 aluminum 6061 plate(a little overkill) And replaced my glass. Also I drilled holes in each corner to fix it with the y plate using spacers with the pcb in between of curse. Since I have abl running already this doest affect my first layer consistency .

This constricted the pcb so it can only flex down on heat cycles without affecting the z height.

My print quality now is great. So definitely the heated bed was causing my banding .