involute gear two rows of teeth - PowerWheel Ride on Toy

I needed a replacement gear for my son's Powerwheel ride on toy. I couldn't find a good customizable gear having the two rows of teeth. So I took the code from the Customizable Involute Spur Gear by atartanian and basically copied it twice. I translated the top gear to go up the height of the bottom gear to combined them together. As my son would say, I'm a "noob" at OpenSCAD, but this gear seems to be working well as a replacement for my Powerwheels. (Not sure why the top gear isn't showing