Bob has great information here I'll try to fill in some other bits. I did find your email in the spam section of the support@ account. The email headers looked clean with a neutral spf so not sure why it was rejected.

Quote Originally Posted by sjjonesnz View Post
1) Can the EM components be (easily) transferred..
The EMS can be moved to the other screen. This is done in house as the unit needs to be calibrated once its moved. If you plan to upgrade to AF-5000 series I would highly recommend considering switching to the SV-EMS-220. The best part of the Dynon external modules is that you don't have to send in the whole screen in for repair. Horsham Aviation in Victoria, AU should have modules in stock to minimize AoG.

Quote Originally Posted by sjjonesnz View Post
2) Can I reuse the existing ... sensors with AF5xxxx screens?
The only ones we currently recommend switching is the VDO Oil and Fuel pressure sensors. We have fully moved to the Kavlico's 3 wire sensors. They seem to have more long term stability and are less error prone.

Quote Originally Posted by sjjonesnz View Post
3) Can I reuse the existing TruTrak autopilot servos if I were to install an AFS autopilot?
Does your Trutrak fly with the EFIS already? If so no reason not to use it. If you are thinking of upgrading the Trutrak head then it might be worth the cost compare between two new Dynon servos.

Quote Originally Posted by sjjonesnz View Post
4) ...using Garmin transponder/ADSB ... Any issues with that?
Garmin has not released their ADS-B In protocol used for the new line of transponders. We can still provide altitude to the Garmin transponder. For ADS-B in we have the SV-ADSB-472.

Quote Originally Posted by sjjonesnz View Post
5) What else do I need to be aware of?? (the ultimate catch all
Pitot and static will need to be routed to the old magnetometer install location and will be replaced with the new SV-ADAHRS-200.

Quote Originally Posted by sjjonesnz View Post
6) ... tradein/credit on my AF3500s, what's the value of that?
25% off a new EFIS with EFIS trade-in, and 25% off new AHRS with AHRS trade-in.