Hello guys, was a bit busy lately, here some pics http://imgur.com/a/PMjKH

We recently bought a black ABS filament reel, to try and see how did it do with the printer, first print we tried the blue thermal sheet lifted and separated from the sticky layer, so we decided to remove it completely along with the sticky layer, and replaced it with some painter's tape, and we used the glue that came with the printer which has a weird vivid yellow colour, and we found out it's pretty sticky once the printer is finished (yes the central piece of tape had to go because when we removed the print, a part of it came off). The problem is some of the prints we made came out with tiny flaws, because, as you can see from the pics, there's a bolt right in the mid of the bed, although it doesn't protrude, it leaves a hole and with heat, it either makes the tape lift, or make the print unlevelled anyway, so we were thinking about upgrading to a glass bed, but we have no idea, which and how, seeing also how much the printing damaged the blue sheet after the first 100 degree print. Any suggestion?