Bjorn,
I'm sorry about what happened to your plane.
I bet a prop strike on a composite prop is much easier on a motor than a metal prop strike, so I bet your engine is OK.
There's a hydraulic downlock actuator for the main gear, but not the nose.
I've got no idea about the nose gear's mechanical or over-center downlock (if there is one), but I'll be watching this thread for someone much smarter to explain the nose gear system to us!