Hi Simon, welcome from down around the corner.
In the interests of teaching you the correct terminology,
I have to do this so please don't take it badly.
Firstly, I assume you are talking about Universal carriers?
Secondly are they U.C. MkI or U.C. MkI* and MkII or MkII*?
If you are a young guy as "Carrier Kid" suggests, then it is great to have you young guys coming through, in the hobby. We need you to teach the next generation.