I can not help you with your questions on the dresden plate. I wanted to let you know I read your post, I wanted to say hello and I wanted to compliment you on your post title. It is very specific and you will get lots of help. We have many, many experts on the dresden plate. They are all so lovely. Good luck.
On Edit:
While you are waiting for the dresden veterans to arrive I thought you might enjoy this post. The members are discussing things that sound similar to your question.
http://www.quiltingboard.com/t-100319-1.htm