I have an assembly with 6 configuration consisting of multiple components at each configuration. Between the configurations some components are shared while others are not. While working in a configuration I suppress one type of cylinder and add another. After I mate the new cylinder in place the old cylinder reappears into my configuration. If I suppress it, it reappears again instantly. Any Ideas? What are some good techniques for working with multiple configurations? Then lastly Can I save configuraions externally to remove them from the master file? Thanks in advance.