This week's lessons - Use both the ACE tool and XML Notepad for editing. ACE is good for setting up new gauges and elements as it provides a table of properties to be completed, and it also has layout guides for the various elements and the mouse areas. XML Notepad is useful to see the detail only where you need to as it only explodes the view where requested, whereas ACE explodes the complete view by default. XML is easier for tidying up as it allows cut and paste easily and has a handy "nudge" facility to move nodes around the list, so you can keep the project in a logical sequence. Both may be used for editing. I think the XML Notepad produces smaller XML files, but I haven't looked to see why yet. Funnies while testing the autopilot led me to examine the various aircraft.cfg files, in particular what lies beneath the [Autopilot] heading. If Autopilot_Available=1 then it should be there, and the same goes for Flight_Director_Available=1. Autothrottle_Available=1 allows access to the AT toggle and associated speed settings. Yaw_Damper_Gain=1.0 allows access to the Yaw Damper, this is required as the YD function is not there as part of the AP. I need to do some more research here too. It may be that the design of a generic AP may be difficult, given the variations between aircraft.cfg files. I have also found that a gauge developed using ACE does not appear to work in FS2004. I need to do some more work on this, in particular by looking at the generated XML code, to see if I can spot the cause of the problem here, as it would be good to have gauges that worked in both versions. More research required again. What started as a simple gauge project seems to have grown into doing more research than I thought, but it has been interesting, and is keeping me occupied while waiting for the new generation hardware to emerge. I looked at Tom's Hardware site today, I see new generation graphic cards have been announced by nVidia, for DX10, but I guess it will be some time before we see them here. Frank T.