Thanks David @davem . I hear what you are saying, and have considered donating the model to a newly established army museum a few towns away. I would have no troubles recreating 'how it was' if the movie bridge was the actual one. But it does not look anything like it. As a result, the newly educated, from observing the model, would be false; and on finding out, would remember that more than the tribute. They may even think the forced enslavement was not real either, though in reality it was far worse than the movie depicted.
It would be okay if the bridge looked similar, but in this case they chose a design which obviously looks grander, over a shorter distance, than it was. Plus, the real bridge was over the Mae Klong River (renamed Khwae Tai), and not the movie river called Kwai, which was nearby.
Museum models are supposed to replicate history. So, in a strange way, this becomes a dilemma, for the "iModeler at the Movies". Especially if the movie is a fictionalized version of the reality. There is a good chance that our local army museum would not take the model for the above reasons. In this case, the tribute won't go any further than my lounge room. Not much of a tribute from there. Well, there is the Internet. But it would contain falsehoods.
My dilemma is to find a middle ground for my own sake. One that points to both worlds of fact and fiction. For instance, in the movie, the POWs seem to abide to the bridge construction, when in fact they risked punishment and death to sabotage it whenever they could. So, to show sabotage efforts, and torture, would point to reality. To show pride of construction would point to the movie. Both contradict each other. The goal then would be to build a model of contradiction . . . a difficult task indeed.
