wonderful progress Wayne. Any a/c accessories with the model. if so, what deckload would you consider. probably a4Ns I would think.
If you change your mind about aftermarket stuff, I would suggest two elements....decking and aftermarket a/c, if you can get them that is. Usually the ones OOB are pretty cr*ppy.....Decking really would do wonders to this model, provided you can get the right scale.
If you have money burning a hole in your pocket, I would suggest some metal gun barrels of some description, but really, they aren't needed to set this model off so to speak.