OK, found a way to fullfill the request
You have to save a part file with a part copy and a one time updated part copy as template for all new part files
You even can delete the part copy from You template file, but the option to auto update still is kept correctly
Works fine here for me!
PS..: of course mode is set to ordered!
I've never tried this before, I've always just muddled through, fixing as I go. Then one day I stop and say, "There must be a better way to do this!"