FT-817 crank knob with custom Oogoo sleeve

thingiverse

To improve the original knob's hard rubber surface, a crank knob and Oogoo mold were created for a softer rubber sleeve. The STL of the rubber sleeve is available for those who want to print it with flexible filament. The sleeve diameter is 1 mm smaller than the knob for a tight fit. Print without support, with the axle hole down for the knob. Adjust part 2 of the mold if needed and fill with Oogoo. Thinning Oogoo with cleaning solvent can make it softer. Fill the outer mold first to avoid air bubbles. Once dried, remove the inner part of the mold to get a soft rubber sleeve. Assemble the knob by threading the screw hole with an M3 screw and inserting the original screw from the old knob. Sand the axle hole for a proper fit, attach the knob, and put on the Oogoo sleeve. Enjoy enhanced grip for better DX performance.