Well I was playing around with 2010 tonight and notice that there is an option for "create boundary from corridor" under the home tab/ creat design tab. This can come in very handy when creating a boundary for your corridor if you do use the "corridor extends as outer boundary" for your boundary in the corridor properties. One thing I did notice from 09 and 2010 is in the corridor properites/boundary tab, if you create a boundary with "add interactiviely" option you can not edit that boundary in 2010. I will try to modify the assemblies and see how my boundary will react to the new surface tomorrow. I just thought I should share this with yall. Thanks for stopping by.