trying to make a complex driveworks model and was wondering if there was a way to have the drop down for configuration to have a none feature. I am basically making a configuration in a configuration and the first configuration has 9 posiblility the second has 24 but I need the first to work when there are only 5 configurations showing I think I will have to do this with numerical values and do if and statements but I was hoping to do this with drop down.