Want to change every instance of a symbol or something. Possible?

[Gene Davis]

I went down the road too far on this before realizing I might want to change.

The soffits on a house are decorated with things called either brackets, dentil brackets, or modillions, depending on who you ask. Whatever, I did them as a polyline solid, then copied and placed. Each run of placements around the roof required some fiddling, because the nominal placement of 48" on center needed to be adjusted. See the pic, which shows them all on two levels, high roof and low roofs.

Now I want to change the style of the part, but retain all the placements. In Sketchup, with these all as a component, one can open up the component for editing, and by doing the editing right about the placement point, one could do this quickly. Edit one, and every instance of the component changes.

Is there a way this could be done in Chief? I know I am stuck now given the way I did it, but was there a better path for me?