I will wait to buy the printer until they solved the heatbed. I understand that abs will stick to the buildtak service, but abs will definitely crack between layers when printed on a cold bed. PLA has a much stronger bonding to its previous layer and does not shrink as much as ABS. After printing many ABS parts on my reprap i2 I learned that the only way is a steady temperature throughout the whole part, using a heated bed and insulated build chamber.
This printer is not capable for ABS because of lacking the heat bed and enclosed build chamber.
Although the board seems to support a heatbed, the power supply will definitely not support as it is not powerfull enough. The connectors on the board are also not capable for 20A+ current that the printer and heatbed will use.
Therefore for adding a heatbed an additional power supply is required together with an aditional switch board with a relais.
Warping of the heatbed is not an issue when using an aluminium heatbed
reprap.me/heatbed/alu-241.html , which is perfect together with buildtak. Or use a glass plate with a kapton heater film underneath.
I was hoping that this printer would be my follow up for the reprap but in its current state it is unfortunately not usefull for my purpose