I moved everything to 4.12 and it’s all up and running again.
I see you are experimenting with terrain deformation… haha… nice… I’m curious how heavy it is on a terrain with grass. I assume it’s stencils that spawn with a deformation map. Could also be a normal map that does not deform the terrain, but does give the impression of leaving trackmarks. If it’s gets to heavy you could also set an optional timer that erases the stencil after an X amount of time.
I love the terrain deforming… Did you ever see spintires?
I added all the OnHit component events also for the wheels. So now it’s time for the rest… I’ll wait until you have time to give me some guidance on how to proceed 
In the meantime I can return to modeling… and the interior control blueprint.
I need a way to set it up seperate from the tiger blueprint. Now all the interior controls are also in the tiger blueprint… it would somehow be nice If I could seperate it so that it is easy to add to a different tank also.
I just have no idea how to organize something like that.
Hence… I don’t even know how to ask for ideas about it 