Everything on the table will suddenly start to float (unless it already is floating). There is nothing you can do about that and if you didn't notice it while playing the game yet it shouldn't be much of a problem anyway.
Try using niconvextransformshape in the hierarchy of the collision mesh, especially with primitive shape, this virtually removes the invisible 'padding' usually around the collision shape, you know what I mean- how havoked objects react to each other before they truly make contact and actually should. sgould help with people who have issues with books and what not. Discovered this in F3 so may not work in OB, It shouldn't even work in F3 as that node should have nothing to with what it actually does in this respect. :shrug:
better quality solver deactivation can help as well.
Motion System I have not experimented with, and haven't seen anyone research them either. :shrug: