When I was using Cosmos 2007 I could add an Immovable
restraint that would limit translation, but allow rotation. In
Simulation 2009 the closest thing to this that I can find is to
apply a Use Reference Geometry fixture with any reference plane
selected and all translations set to 0. The simple Immovable
restraint seems to no longer exist. Is this there a better way to
do this? Thanks.