If you want to draw by the core center, Joseph, the workaround now is of course to offset the reference line in the wall settings dialog ... but of course, you (unfortunately!) have to do the math.
A similar wish that I have is that I frequently want the reference line offset (wall settings) to align with the outer skin of the core. Again, I have to look at the composite, determine the width of the non-core skins, and then use that value as my offset.
So, if this satisfies your wish, let me know - otherwise I'll post this as a separate wish: My wish for a solution to your and my problem is that the Composite dialog itself have a means of setting the reference line offset. And, just as with skin linestyles, pens, fill pens, etc., the wall tool would have a checkbox to indicate if it should override the offset specified in the Composite or not.
I imagine that the offset box in the Composite dialog could have a "picker" (like various apps - color pickers, hyperlink pickers), and that I could then 'pick' a skin line, and that value would be automatically entered into the offset. And, for your case, there could be a 'center of core' checkbox so that the math would be done for you.
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