This is a version of my wheel for the Flysky FS-GT3C that have a knob for one hand driving. This one will print together with the tyre for avoiding slippage, but a tacky/rubbery filament is recomended for better grip.
Edit 22/01/19: Extended the knob. Should make printing it more difficult, but now the finger grip is closer.
Edit 20/02/19: The knob extension now prints separatelly and needs to be glued.