Yep, Certain marks of Mossie could carry a 4000lb bomb, but with the exception of GEE, bugger all else in the way of navigation equipment other than that used for DR (until late 1944, the only Navaid that would work deep in Germany was H2S, Oboe and GEE and GEE-H were limited in range to the Ruhr). Plus the old cookie wasn't a weapon that could be aimed with any accuracy and all of the deep penetration raids into Germany by Mossies were done at high level. The main role of the Mossie was to scoot off and bomb some other part of Germany that wasn't being attacked by the main force, just to draw off the German Night Fighters. The main force heavies on the other hand dropped the Cookie and what ever else they were carrying (normally 4lb Incendiaries) in one go, so that the Cookie blew the roofs of the buildings so that the 4lb bombs could start the fires. Yes the Low level Mossie attacks were very successful, but none of them were against targets deep in Germany.