Finishing off a twisted leader

[gone_phishin]

I am trying to find a slimmer way of finishing off a twisted leader I use for chasing barra. All of the videos I have seen on this just use either an overhand or a surgeons to finish off the tag ends after the second twist, but this just seems to add to the thickness of the leader too much, and therefore you have the ferrule problem come into play. Any suggestions for a better, slimmer finish please?

[Stressless]

When I make them I whip the tag ends with 20lb Schneider, add a dab of knot sense.