Hi,
I was wondering if you could consider one day building a variant of your DA40NG, equipped with a KAP140 instead of the GFC700 autopilot. It is a combination that can be seen very ofter in real life, because the KAP140 is significantly cheaper.
The KAP140 being tricky to use, I think it would be an interesting simulation platform to practice for many student pilots throughout the world.