Kawsome,
You are highjacking a thread, usually you create a new thread for a new question that is different to the one discussed it is easier to answer.
For your question it is usually easier to post a sketch of what you are trying to do.
Anyway if I can guess what you want the answer is in the help file under Trim to Roof, you might also read about Solid Element Operations.
HTH
Eduardo Rolón AIA NCARB
AC27 US/INT -> AC08Macbook Pro M1 Max 64GB ram, OS X 10.XX latest
another Moderator