Thanks for the comments gents, although I certainly don't think I'm any kind of master - there are a few on this forum who put far more detail into 1:72 models than I ever intend to!
After getting the exhaust sorted out, the next step was adding the MG's and ammo guides. That was done after opening up the slot I'd cut in the D.I as I couldn't get the gun to sit low enough. I also added the "wires" for the cabane bracing while I could still get at the holes I'd drilled.
Then the next big step - the upper wings were attached to the cabane structure.


The cabane rigging was then connected up and the coolant header tank and pipe were added to the D.I

Last job today was to make the rest of the wing struts. I used .015" plastic rod and glued strips of .015 x .030 strip to them.
I now have two sets of struts which just need to be chamfered down along the rear edge, then painted.

Thanks for looking in!
Ian