Sounds like your little guy is going to be a big healthy boy. I don't know much about ears since I have only had one set of Yorkie ears to deal with. I think keeping the hair cut short on the ears from an early age helps them to stand more easily. Even a little weight from the fur on their ears can deter them from standing.
It's great that you are working on grooming him daily from an early age as he will be used to it when his longer coat starts coming in. Some people wait until the puppy is older to start grooming and then they have their hands full because the pup does not want anything to do with it. Combing daily even though they don't appear to need it makes them accustomed to being touched and combed and to have to hold still when a real grooming session is going on!
