Thanks Gamera! I kicked off cutting plastic last night:
I think a sheet of 0.020" got into my packet of 0.030". I was wondering why the bottom plate was so easy to form. Anyway, too late, gonna keep going! I'll just use 0.020" to plate the bottom when it comes to detailing. I now have to make sure I can cut those "happy" windows with the arched tops in a neat, evenly spaced manner.