Zavashier did you have to change anything in firmware when upgraded to E3d hotend? I am going to upgrade mine to E3d j-head with x carriage replace and relocate motor to top of the frame, the stock hotend isn't great, the stock thermistor probably not reading the temp correctly either, If I print at 235c to 245c it will shrink really bad and does not stick to the aluminium bed with kapton on it, at 264c I have very little shrinkage but still not perfectly straight going up the layers, If I go any higher I get max temp error 2 layers in to the print, no clog no click on extruder motor, not over heating either, likely is the thermistor faults on this occasion.
Thanks