2 things about bullet particles

[Gustavo Eggert Boehs]

Hey guys two questions about Bullet particle solver in Softimage.
1. Is it me or does it slows down MASSIVELY, but I mean really SUBSTANTIALY
when a actual shape deforming collider is used?
2. Is there anyway to control collision offset? A simple torus falling on a
grid and it is like a quarter of a SI unit or something apart, looking
quite bad in the render...