As I have said I have looked over his data and my conclusion is that it is accurate enough for my purposes. I will blame neither he nor you if that turns out to be untrue. I'm not training for anything and I have no specific application in mind for the data. Having the data will lead to the applications and if I have to be careful about how I collect or use the data for some future purpose that is much better to me than to compromise a bike that I like for every mile that I ride it on the odd chance that I will "need" a DFPM and only a DFPM for some future purpose. Surely the data will be useful for training if used appropriately and surely it is better than Strava which has no estimate for aerodynamic forces, does it? People trained quite effectively before we had power meters or heart rate monitors. If a less capable power meter cannot be used exactly the way you use a DFPM that does not mean it cannot be used.

Velocomp has a new "Aeropod" version of the device that can be used to do useful things when paired with a DFPM so the technology is expanding into an area you might find useful after all. A company called SwissSide apparently thinks so since they are supposed to be coming out with a competing product, also called Aeropod. The squabble over who has the rights to own the name could be interesting if nothing else about the product interests you!