For me, the Olegature and the Dukoff were not a good combination. The "chain-mail" of the olegature really digs into the soft metal of the Dukoff. When I did play Dukoffs on alto and tenor, I used BG Revelation Jazz ligatures which are basically leather ligs with metal reed plates. They were a little fussy to adjust but worked better than anything else I tried. Oh, I did use vintage Harrison ligs for a number of years until they broke (not the most robust design, IMO).