Steve3drALS, then Rieger has to have two kits for the Mk 4, the one I know of is the XXXXL one, like a f16 jet, teh F40 kit, but sorry have to dissapoint you even the GTS kit doesn't look like this beauty!!
It could ave been a base for the kit he has made and did his "homework", what counts is he will have to tell us soon