I recently added this CODA crankset to my Cannondale hybrid to turn it into an 81 speed (9X3X3).



Above is just the CNC chainrings milled from one piece of aluminum and you can see the slot where the crankarm is bolted to the rings.

Well the thing is annoying to no end. It pops and creaks with nearly every revolution. I'm assuming it is at the junction between the arm and the rings. Maybe I need to remove the arm and add some grease between the two pieces. Any other suggestions?