Consider to follow if you like what I do.
Just ask if you have an idea to a brick piece/rc/other stuff you want to be made.
I do most mechanical design. Can do easy basic patching.

Second upload because the last was taken down.

Pictures: https://imgur.com/a/bZYSqdm

Helical gears.
These are 45 degrees.

Resin printers are better than FDM to make the gears smooth. FDM will work but you have to do the instruction below

Note this if you are using a FDM printer: You have to wear down the gears a bit before use in a vehicle/creation.
Build something like in the picture connect a motor to the smallest gear and let it run for 10 minutes. After that. Connect the motor to the bigger gear and let it run for some time until its smooth.

Print with 0.1 or lower.
I printed the 36t gear with 0.1 and 30% infill. 12t is printed with 0.05 layerH and 100% infill.

If you want other gears straight cut or helical. Send me a message and we'll make it happen.