Taigen V2 3:1's installed. Miscommunication during ordering lead to ML boxes arriving, but I was able to get them mounted on 3 screws each since they have both sets of holes, but had to install one unassembled since the rear screw was under a gear.

They are smooth and really quiet compared to the 4:1's that were in it. Perfect speed, but obvious loss of torque. The battery was pretty low, so I'll know more about low speed turning and if it's acceptable in about 30min. I really enjoyed the precise low speed turning ability of the 4:1's and the fact I could roll along over any terrain at a scale soldier's walking pace. Definitely unable to move that slow with any power with the 3:1's.

Banebots sent me 370's instead of 380's, so it'll be a while before I can see if they add any torque.