Yeah you are right mamba monster ESC's are quite expensive. But when you get hands on them, they are really very good. Actually you can always even get them cheap when used but still in mint condition.

You can buy a stator with a 5 mm end need the bearings the stator and 1 end caps and 2 bearings

im doing the 1412 with mamba x on my ryft build

The 1415 motor will drop in and heat sink fits perfectly dropped right in on a big rock with the copperhead esc and 2 2s packs running 4s  1415 2400kv 5mm shaft with a 17t pinion the safe d pinion wont slide on without filing down the flat more on the shaft i chose to use s regular pinion  and not mess with it tho but did think about it

I just use a fan don't need a heatsink

What are your thoughts on this ESC/motor package now? I was considering dropping one into one of my Traxxas Stampede 4x4s. I recently upgraded both with Velineon 3500s and VXL-3s ESCs, and while overall very happy it did leave a few things to be desired. Startup and low throttle response is terrible, makes it hard to perform crawling feats I used to be able to do with the stock, brushed motor. It also doesn't seem like they'll be too good for bashing on 3S like I'd hoped, I geared down quite a bit to bring temps down and they still seemed to struggle under load. I was hoping a setup like this sensored 1412 and Copperhead ESC might give me exactly what I was hoping for. Any thoughts?

I drag race and would run that on 6s I'm running a 3800kv castle on 6s now.  But weight and gear ⚙  and heat you have to be on top of but I'm running 132. Feet 3 pass at most