Studying FS9 model convert to FSX/P3D model


I started today study how convert older aircraft model to FSX/P3D compatible. My first converted model is Mikko Maliniemi Maule, everything is working pretty well, only the lights dont work and prop disk not get blurry.
I used this very good instructions to make first convert:

What i missed, i seperated prop_slow and prop_blurry models and merged them after edit, but the disk will not show up when engine is full RPM, i still see the blades.

Plane is for my own purposes only, dont have permission to share addon. :)

This screenshot is from Prepar3d v4