The tricks to keeping it from disaggregating is wrap firmly but not super tight, and the pull-through piece. You know the twine is wrapped tight enough when the pull-through is difficult to accomplish. Pull the loop at least half way under the wrapped section. Make the pulling ends of the loop piece long enough so you have a good purchase on the string for pulling under the tightly wrapped
twine. Lots of friction there.
Or, wrap the bars like Peter, center to ends and use the end plugs to hold the tape in place. No need for twine or tape at the stem area.
Mike SLO CA