I have G4 along with the freebie addons you can download and install from RealFlight's web page, and I can not find the Sig LT-40 either, not that I am interested in it. Why is it you believe it should be included?? I have not been following this forum for very long, so if you have been discussing the adding of this model to their s/w, I apologize. Otherwise, I I checked their website (Realflight's) and I can not see that model in any of there releases, as well as in any of the "Expansion Packs". So, unless you know that someone added the model, and you are trying to import it into your release, I am not sure how to help??