Gunga, in what way were conditions in the Miocene diiferent than todays? You seem to be trying to cadge an argument from ignorance here.
Atmospheric conditions were almost identical to today, as were all metrics of paleomag and gravity. AGU publishes a series of monographs regarding variability and anomalies through geologic time. I defy you to find something significant re: atmospherics or grav/mag that could affect lift/glide.
I think that an 05 article about a 60ft pterodactyl may have been big news at the time. However, by 2008, it appears that most of his colleagues (who actually gave a **** about this) found that the original footprint came from rocks that were almost 45 million years earlier than the manus and radius bones. It turns out that the radius bones were found to be WOOD. Howcome, because there were clearly seen vascular bundles and growth rings indicating annual girth. Bones, especially long bones grow with bone forming nodes in the center and, in the case of the flying reptiles (actually not either reptiles or dinosaurs), they would have been hollow.
Now think about it, no other "bones were found" and the footprints came froom another continent that had broken off from Pangea about 130 million years BP and the "Bone was found in late Maestrichtian time (near the end of K times. Hardly rigorous science.
Im not a rpaleontologist, Im an economic geologist. However, we use paleo as a "Tool". Econ geologists are more sensitive to stratigraphic relationships in "index" fossils because the times are important to us for resource development.
I reject the 60ft pterodactyl story without much better evidence. Id love that more work would be done to bring this area to a conclusion. However, you are easily impressed by "hypotheses".
Im amazed at how you deny the strong evidence in evolutionary synthesis but you buy this kind of stuff with not a question. I think that you, as indicated by EDgar, rely on a much different playbook of "worldview facts" .