DX9 Trim Switch
thingiverse
The Spektrum Dx9 transmitter has trim switches with unnecessarily flimsy actuator arms -- see the attached photo. My brother broke two and was ready to send it in for repairs for (?? $$) or buy a new transmitter. I said "Hold up"... why do you think I have a 3D printer? Designed in OpenSCAD, it's way more solid than the original. Print it standing on the pivot point, with supports "touching buildplate", and recommend 100% infill. It may take just a touch of sanding or filing to adjust the actuating points to trip the switches, but not much. I don't know which transmitter model other than the Dx9 the part fits, but if yours looks like the photo of the OEM part, this should do the trick.
With this file you will be able to print DX9 Trim Switch with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on DX9 Trim Switch.