i am new to 3d printing and i just picked up my first printer Kingroon KP3S and i love it. I have adjusted and leveled the bed as best i can but it is warped. i just printed a few prints and they came out great as long as they are in the center and the base is no bigger than 2 inches round. if i have a bigger base than that i seen to hit those lower spots and cant get it to adhere right. i can see with a ruler that the bed is not perfectly flat. I see on some of these printers they have a nice aluminum thick bed that is sold and doesnt move or warp. Does anybody know if they make something like this for my printer or maybe a piece of thick tempered glass. any ideas would be appreciated. Thanks