Steve,
I started by removing the molded iron hoops on all the masts as they were not introduced until 1800, I did leave the front fish ( the raised section on the fore side of the mast), but added the filler pieces to each side for a smoothe transition for the rope woodings which number 8 on the fore mast, 9 on the main and 6 on the mizen.
Also the cheeks ( the raised sections on either side of the mast) on the mizen only will need to be removed as they were used around 1790, this did require some material to fill the void left after removal, I used brass tube and putty.
All of the this would be approprate from 1773 and on. A lot of work for sure considering the beautiful job you've done already, if you're up to it I have some pics..Cheers.
Michael D.