Kevin,
you are correct, markings can always be changed but......
It is a tricky one, personally I am in favour of original markings only or appropriate as the next best thing but that is just my opinion. Far be it from me to tell anyone what to do with their own vehicles!
The lack of unit markings on my Sherman doesn't seem to stem any feelings of nostalgia though!
Malcolm told me you couldn't make it with the carrier as intended, hope you get it sorted soon. It looked good at Henham. You should have come over, I would have taken you for a spin round the playpen!