I've had my printer for about a month now and already have a couple of successful, but far from perfect, prints. I upgraded some parts like metal extruder, stronger springs and I also added a BLtouch because the glass bed is pretty damn warped. I can set the edges to be at the perfect height but then the center crashes pretty hard into the nozzle, I would estimate its like a 1.5mm difference. Same goes for the corner to corner middle part on the left and right which are also 1-1.5mm closer to the nozzle. I thought maybe BLtouch will help with this but it basically did nothing, I also changed first layer settings in Cura and washed my glass bed mutliple times, changed temperatures etc. but nothing helped. All I can really do at the moment is level the bed around the center, which will leave the edges to be too far away from the nozzle and it barely sticks, I'm limited to small prints which can only stay in the center.