when it only comes to performance i am still happy with it.
It is faster than my novarossi4btt.It is smoother.
And it does get a lot of beating from me landing on the roof.
And the clearance between engine and chassi is small.I race with medium flex.
Only my rtr car (ansmann vapor)had lock washers on the engine.The xray dont.
I always use blue lock tite.Never had any screws loosening.Never seen anyone using lock washers.But i might concider it.

I think my case did brake as an result of too many hit.
The weard thing here is that the crack i am talking about here is not really a
crack.But the engine going apart where it was put together from the factory.
It did simply open upp.
I dont know how they put it together but it is easy to see where.

On the novarossi there is a enforced cover/plate on the same spot.So it
will not go apart...

sorry for bad explaining but my english is wery limited....