I recently got an ATED60 and I love it but until recently I haven't been able to make flats for it. For my SCT, it is easy. You just point it up and lay an LED panel over the end of the dew shield. But this little refractor is way too small for that and I don't really have a way to point it at a wall with the LED panel hanging vertically.
So I got a small LED panel like this one from amazon:
It has a grid of large LEDs so I needed to add several layers of paper and white cloth T-shirt to diffuse the light.
Then a simple 3D print job to allow it to slide over the end of the OTA. And it works perfectly!
This panel also is nice because it has on/off and bright/dim switches on the USB power cord.