One straight pin at each end. Cut the heads off. (For 270s & 280s, one paper clip wire). smo-joe On Jan 21, 2015, at 6:08 PM, Cal Cal wrote: > Hi Everyone > > What do you think the optimal curvature is for the mouthpiece of a Hohner > 260 chromatic? Do you think it should be different than that of a 270 or a > Chromonica 64? > > Daniel