I downloaded a caster assembly (Colson) from 3D ContentCentral which I'm using in my assembly. The caster assembly is fully defined and does not move at all. I would like to spin the caster just as it would in reality to check for collision in my assembly. There also seems to be no mates which could be deleted. Can manufacturers/people lock models uploaded to 3D ContentCentral? If so, can they be unlocked? I've included the zip file received from Content Central. Thanks in advance