I have helped old guys get all sorts of models in the air, and nothing like the look on their faces when they get to see their creation airborne. Worth every bit of effort you put into it and more. I just have a hard time understanding why some don't go that extra step to get a model finished and in the air, but as long as it got there and he got to see it, that's all that matters.
Type at you later,
Dan McEntee