Yes, I would reinforce that. Success rates now are well below 20% in federal granting agencies, and without idiots applying.... I mean, really top-rate scientists are applying. One out of five gets funded, so I don't think there's much chance of you getting funded for something that's already been done somewhere.
What is a little irritating and disappointing at times is that you might be turned down on the grounds that this is really development and not research. That's something that I find happens to me occasionally. The cost of prototypes and things like that are easily excluded. That's where it comes back to this agency, which maybe takes things a bit more to the applied side.