In the past I have not used these moulds due to the lack of a trumpeter and carbine, however I decided to buy a pair (in the recent half price sale) to give them a go and add the missing parts from SYW cuirassiers. I cut a bit off of the end of the cuirassiers carbine - but I think it is still a bit too long.
I also made a trumpeter - this was a bit more radical - I cut/filed off the whole of the arm from the hussar with the raised sword, then glued on a cuirassier trumpet arm (after filing off the swallows nests). The arm is actually on the large size, but close enough.
I suspect there will be a deaf horse if he blows the trumpet, however I tried raising it but it ended poking him in the eye - which looked worse.