Originally Posted by BobW

I'm looking forward to the updates too. I'm stuck on a bug right now that is driving me nuts.
Anyway to answer your question. The easiest way to handle what you are looking for would be to create a new chassis model. Just click "New Model" In the chassis manager and copy everything into the new model. Then open the chassis manager using the new model and change the X1 dimension to include your horizontal shim. That should do it.