My taxidermist sends the heads off to be freeze dried, which is supposedly preferred to just putting a plastic head on there. But I’m no expert in taxidermy.
Gary Hubbard mounted my turkey years ago. He told me that freeze drying was the only way to make it look realistic. After more than 30 years, mine still looks like it's flying away. You made the right choice. I have seen others done differently, but can promise you there is no comparison. I haven't talked to Mr. Gary in years & can only assume he's still living. He's mounted deer for me as well & have had them back in only 3 months. He has never taken in too much stuff that he couldn't do the job fairly quick. He's a heck of a taxidermist. You should be happy with your turkey mount by the freeze dry method.
