Main reason to remove the self-tacker is that in a bad tack the tramp-mounted jib sheets don't get caught up in it. These jibs are quite long, especially if you have a single barber rope cleated in the middle that pulls in both sides at once, as opposed to system that you release before you gybe and then re-set. The single rope for both sides is really good and really quick, but does mean the jib sheet needs to 1 to 1.5m longer.