Not familiar with the Lesu unit but after reading thru build threads I've found most use a 3:1 or 4:1 unit. I have a 3:1 planetary unit I want to experiment with. This gear unit
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
With this motor
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1