BL Revo or BL E-Maxx?

[Serum]

Yeah, with XL i mean the XL of wanderer/nemesis/feigao, in 540 size.

The advantage of the lehner motors is that they use segmented magnets, which makes them more ideal for partial load. (about 95% of the time it's used, it's used on partial load) and the lehners are topnotch. They don't require an optional clamp the keep the front/end bell on.

4S would be no problem for the mambamax, you need to use an external UBEC though, and disable the internal BEC by disconnecting the red wire that goes from the controller to the receiver.