Physics Simulation Forum

Hello All,
I just started using Bullet for Maya and It's disgustingly FAST!
The problem I have I can't glue some of the pieces together.
here's the situation:
I have a geometry that I shattered in Houdini, I brought it back to Maya and created "HULLs" for every piece. I set the Collision margin to .001 because the pieces explode as soon as I hit play. Making the collision margin so small helped but still these pieces push eachother away when I start the simulation. I know that I can turn pieces into active and passive but is there a Glue option that I can have the pieces stick together until an external force hits them?
I'd appreciate any help!
thankssss