micro magic mix n match

I’m looking for a mmr second hand or to assemble to get my son starting in rc sailing but i don’t know much about mm class. I’m racing in IOM class. I find it difficult to get a mmr second hand. so I’m turning toward kits or assembling it from replacement parts. I know it is supposed to be a one design class but can you use a deck from the carbon looking kit and hull from the non carbon mmr ?