The pattern did not specify pads and I don't think they were used in the original garment
au contraire. I would imagine that it didn't specify padding because it wasn't a book about fitting, but a book about military patterns.

The heavy fabric for your second fitting is a very good idea. Don't forget the padding especially in the shoulders, even if your shoulders are equal. Not all padding is for fitting, shoulder padding in heavy coats is to help support and shape the fabric to help distribute the weight. The heavier the fabric and the longer the coat, the more support it needs on and off the body.

Please don't take any of our advice as criticism. I think you're doing an awesome job.