Ended up ditching my MX518 legendary, to many issues, some small and can be fixed, others not that easy. Buttons to stiff, DPI levels are off compared to other mice, sensor fealing weird, hyperglides dont fit in height etc etc. As i said some of them are pretty easy to fix. After having owned all mice with this shape for god knows how long, mx500-510-518 G400-400S and now the MX518L. Going to step back to the G400s for now and try out glorious model o and maybe the latest zowie EC batch again.
Its just going to be my opinion, but i dont think logitech did that good of a job on the legendary, main reason being the buttons are way to stiff even after being worn in, the D2FC-7N 20m used in this mouse isnt what they used to be.