Especially from this angle:
https://voilesetvoiliers.ouest-france.fr/course-au-large/route-du-rhum/route-du-rhum-alberto-bona-met-a-l-eau-son-nouveau-class40-trois-mois-avant-le-depart-de-la-course-49f381f4-1309-11ed-8f9b-665e497af072
We asked for a cunningham attachment point in the jib for this purpose. Run the line from slightly above deck down through some sort of fairlead or small block at the tack and put the purchase on deck or even run the line aft to the 'piano'.
I think Open60s do it, too. If I remember correctly Boris Herrmann had to climb his mast to sort out furler issues. I would carefully look at the benefits vs disadvantages. What do you gain?