Hi Downunder, thank you for replying. It happens with the most to date Flashprint and I have tried using earlier versions. I just print with the SD card so there is no issues with routers etc. Trying to increase the thickness of layers does not seem to make much difference. Closely watching the last print it is like the bed is not lowering for each layer and each subsequent one destroying/melting the previous. The bed is then physically being pushed down and bouncing back as it attempts each new layer. The bed moves fine though when levelling and setting up.