3ds Max :: Massfx - How To Combine Objects For One RB Simulation

i have some problems combining multiple meshes in one rigid body simulation. What i want to achieve is a button containing a metalplate, a plastic body and a needle 200x multiplied and each of them should be treated as a single massfx object. This bunch should simply fall on a plane ending with accurate, physically correkt positions. My way was using all parts with a physical mesh constrained (RB constraint) to each other part as childs. This works well with one whole button, but copying shows some strange beahviour of the constraints - and doing 200 pieces manually is not the way i want ;-)