I'm glad I did the test version first. I learned a couple of things.
First of all I need to iron between steps when I do the next one so that it sits better when finished, and also need to trim the lapel seam edges more so that they'll lie better.
Secondly, there is an error in the pattern.
and now that I know that I won't waste more expensive material.
I also decided that I wanted more material in the back of the skirt to give a more traditional 1890s walking skirt shape.