I had a large piece of PEI which I cut down to fit the bed, and while it doesn't fix all the imperfections, it helped a great deal. I actually have an exact-fit piece of borosilicate glass on the way, but after putting on the PEI, I decided to use my temp probe on the bed, and found out the front 1/3 of the bed doesn't appear to be heating at all (or very little, it gets to maybe 51c, middle of the bed hits about 110, and back where the thermistor is gets to 91-95 (where I have the temp set for my ABS prints). That would definitely explain some of my lifting problems I had with the the printer before the PEI.. Anybody know where you can get a replacement heating pad? I'm tempted to just order a Prusa i3 clone and modify that, I just like the look of the fully enclosed XYZ machines (and helps with the grandkids, they know if it's closed, don't touch).
I was just surprised that the temps were as bad off as they were, that bed is all over the place temp wise, no section is consistant at all.. I'm wondering if I just need to get a warranty replacement for the whole bed (it's still under warranty I think, lol).