ronsii wrote:The base model is really designed just for printing with PLA.
+1
Without a heated bed, printing ABS is possible, but very difficult. I have printed in -6c in ABS with a custom acrylic case with poor results. PLA works great in these conditions. But ABS will require higher temps and an enclosed case at least.
If you do not want to upgrade to a heated bed, or do not feel ready for the task:
*upgrade the print surface to glass and apply extreme hold hairspray or glue
*make a case from acrylic...should only cost about $20 if you go hog wild in the design. This will keep the heat in which is needed for ABS since it cools too fast.
*properly calibrate your Z. If you start printing your first layer too high, it may bond other layers, but will guarantee lifting
*calibrate your extruder. If you are under extruding, even if height is dialed in, you will have lifting.
***read through Soliforum as much as possible and post as needed. I have solved so many problems just by scrolling through this site.
Hope this helps! 
Printit Mason and Printit Horizon printers
Multiple SD2s- Bulldog XL, E3D v5/v6/Lite6, Volcano, Hobb Goblin, Titan, .9 motor, Lawsy carriages, direct Y drive, fishing line...the list goes on
Filawinder and Filastruder #1870.....worth every penny!