here is a line drawing of the rear end of a Mk2 (from my service book) best advice i can give you is to keep an open mind (this advice was given to me)
note its designation "medium machine gun carrier" each type would be slightly modded, now i wonder if Ledsels wasp has had full covers put on to protect the propellant tank ? i presume would mount here (away from the crew) Leds you will be able to advise here better than anyone i guess
