Charles, Normally, they would change their boards, as this would be the only unit insignia that they would have worn. If an officer was transferred to another branch, especially during the war, he most likely would have continued to serve in the uniform of his previous unit. I know of one order which authorized officer's who were transferred out of cyphered grenadier regiments to continue to wear the cypher on the shoulder board with the new unit number superimposed. It made for a odd looking insignia, but it was done and I have an example in my collection. Regarding the state colored darts (Faden), I would think that would be a personal choice, influenced to a great degree by opportunity to get replacement articles. Chip