I've read where some people cover the feed dogs with a business card or something like that. They tape it down on the bed and serves the purpose of the metal feed dog cover. I don't know if they pre-punch a hole for the needle or if they let that happen naturally as the needle goes up and down. I am anxious to see your work. I too have an interest in that kind of machine embroidery but haven't taken a stab at it yet.