The really stupid thing about this is that Captain Sim doesn't need an interior model - there is already one in the model, and it works beautifully! The gauges need replacing, but I would be willing to bet that they already have an adequate set of xml gauges on hand. Remember that they currently sell a P3Dv4 version of their 737. So what's the problem? Answer: animations. The landing gear and control surfaces need animating. The best animator that I know is Gordon (gman5250). My guess is that Gordon could do this job easily in no more than a couple of days (and that would still allow some time out for a ride on the Harley). Before you go racing off the appeal to Gordon - I'm quite sure he would NOT modify the 707 without permission / a contract from Captain Sim. If it's this easy, why hasn't captain Sim at least hired an outside guy to do the job and start the money flow? I for sure would pay a nominal amount to get my 707 back into the hangar. Answer: beats the hell out of me!
Oh by the way - the exact same thing is the case with their 727.
Bill