u/kuanying

I love my MRD but its loud, high-pitched noise sometimes gets me. It also limits the time I can play it in my place as my wife complains about the noise all the time.

So I figured maybe belt can help. To do that I cut a groove on both the pinion and spur gear, removed the counter gear, and throw in a Lego rubber band. And it works!

Without the counter gear, there seems to be a bit more torque twist. And it can actually be too quiet, especially at medium and low speed. But I do like the sound better. Highly recommended to those who want a quieter MRD.