I don't think you read the post, or understood it in any case. I have used the "tube" method and it is much more difficult than what I am doing.
I am putting the tag end of the line thru the eye of the needle sideways after wrapping the loops, then just pulling the needle out to finish the nail knot.
This is SO much easier than threading the line thru the middle hole in a tube, pushing it all the way through the length of the knot, pulling out the tube, then tightening up the knot.
If you are thinking I am using a needle like the old "nail" method, I can understand why you think it's difficult. But that is not the case at all.
What I am doing is far easier and faster than a q-tip tube. I only need to place the tag into the needle eye, then pull the needle out and it does all the work. It takes about half of the time by the tube method and with much less difficulty.
But thanks for the suggestion just the same. I've tried them both but found the tube method may be much easier than the "old" nail method, but not nearly as easy as the side-eye method I am suggesting.