Voltage reduction

[Blender]

If you want to switch the motors the leimbach pumps use a standard M3 screws with 25mm spacing. the stock motor has an eighth inch shaft, but it's a little shorter than the standard motor shaft. that's easy to fix though. I've been experimenting with different motors on my pump over the last week. I'm now using a very tiny brushless outrunner.

espeefan's switching regulators would also work just fine.