I think something is not right with either the firmware or the configuration file provided by XTool.

Despite entering the correct information, as directed by XTool, regarding the workspace size in Lightburn during installation and set up of the device there are problems with the Y axis information in Lightburn. The Console reports a Y axis of 406mm despite that with the extension kit and the correct information in the device settings entered this should read 930mm. It is not possible to change this setting in the Console.

This error affects the Home operation in Lightburn, causing me to have to press the Home button twice (or more) to force the laser to reach the actual x0,y0 Home position. For example,  if the laser head was at the maximum Y axis position, pressing Home causes the laser to move back on the Y axis only by 406mm, not all the way back to Y0. A second or even third press would be required to achieve this.

Changing the setting in XCS to Laser Extended prior to using Lightburn has no effect to remedy this. My only conclusion is that something is not right in the firmware or the file xTool-D1ProV3.lbdev.

I'm no expert at this so I may be wrong, but this is my conclusion as there is nothing else a user can do to change the setting. I notice Many D1 Pro with extension owners are complaining about this.

To be clear, I'm using the latest firmware and software versions available at this time on a MacBook Pro running Catalina.

Support, could you raise a ticket and help me with this please.