My second orangeglo, I am just waiting for the orange stripes on the bottom, and trying desperately to note the change in sheen. I can't use the dry tendril as a clue as something has broken it off.
In the colder zones, I cannot emphasize too much the importance of starting the melons early. Many sites say they cannot be transplanted, they can, they will be set back but if they are far enough along in the process setting back a week is better than planting seed directly in the garden that will never bear fruit. I would also note that I do have some vines that were transplanted that have very small fruit and have set them to late. I guess, when you are pushing the zones, more is better as failures of some will be inevitable.