I have fletched dozens of arrows with "regular" contact cement. It worked great. But I recently bought a tube of Duco, and I can't get it to work. With contact cement,I put the feather in my jig, then I lay a good bead of cement on the feather, then press the feather to the shaft. I immediately remove the feather and let both parts dry for about 1-3 min. then I reapply the feather and it stays put for years. If I do this with duco the feather doesn't stick well to the shaft , almost falls off. What am I doing wrong?