Are the cr touches supposed to give a different mesh every time you run it? what I have done is trammed the bed and run the auto bed leveling multiple times and each time I get different numbers on pronterface. I copy the mesh and paste them into a website that allows be to have a bed visualizer like octoprint. This printer is stock no upgrades except for the garolite sheet. I have tried putting aliminium foil in the spots that are lower from calibration tests but the mesh seems to get worse when I do this.