Thanks!
further work, added the ejector chute pieces, filling and sanding necessary for both also fixed the front end and added the nose cap for a nice clean fit.
another little fix was to redo the circular rivets on the large lower panel, some of which all but disappeared when filling and sanding the joint line, so I grabbed a suitably sized small brass rod filed the edge to a champfered point and then carefully pressed and turned it into the plastic to resurect the circular rivets, to maintain the consistency I went along both the front and rear lines to ensure they were all the same....