But I found that the printing speed when you drop from 1000 mm/min (default in the process dialogue window)  to 800 it goes well, nice a fast still. Also I set the bed temp to 100 degrees C. I notice that the lastest xyz ware commented out the bed temperature ( by looking at the downloaded offline gcode file). Is this a deliberate problem aimd at getting customers to update to the latest firmware (with whatever 'extras' on board)? Nasty business practice! The lack of the bed temp causes the bed to start to cool well below the default 90 degress C, and so the print lose their grip on the bed, which happened to me, so causing me to
recalibrate the bed height.

Firmware such as Repetier .92 has the settings already defaulted pretty close. Right now Repetier is the only firmware that will work on the stock controller.