How V1 is your V1? Does it still have the Steve's extruder? If so, I can guarantee that the default extruder e-steps were not very good. I also have a V1 but seriously upgraded over the years.
So difficult to tell from your photos; on the first one, I would have said about half way. But the third photo, you seem to have it just about spot on.
Thanks for verifying. Going off another post I tried the "horizontal" angle macro pic (last one) which seems to give a more defined, although differing area. My path is very short with a Nimble directly on top of an E3D V6. Can't make out much difference by eye until almost the top.