try moving the end stop micro switch a mm or so in the z direction to compensate for the extra bed height. From the pictures the top surface of the print bed seems very uneven which won't help!

ABS can be very difficult to print and in the end I found some brands I could print effortlessly others not at all some would stick to the bed so well tht when the shrunk the layers split apart, all this in a heated enclosure.

I print ABS on a Tufnol sheet with ABS milk as the adhesion promotor, with the usable filament brand it works every time!!