OKAY this will be a fast one this project will be making a redcat Sumo take hobby grade electronics.
I bought the Sumo years ago, and gutted it as I hated the AM radio, and how it used 4AA's. I think I might have burnt the stock electronics out even as I remember hooking a 2S lipo to it that I rubber banded onto it
I remember it had a proprietary 4 wire servo.

I already replaced the electronics once, but it was very shoddily done. I literally just used a rubber band to hold the lipo on it, and either a rubberband, or wrapped tape around the ESC, and RX to hold it on top of the very narrow chassis.
The width of the chassis is 23mm's so you can see not a lot of room.

Here's pics of what I'm starting with.






My plan is to 3d print a tray that will replace the cover that used to hold the electronics that will be close to the width of the body so it should give me plenty of room to place the small ESC I have from the 1st try, and the RX on one side, and a small 2s lipo on the other.
I also have a micro metal gear servo I'm going to throw into it. This should be a very fast project to complete, and I'll probably just throw the STL up in a zip file when I'm done with making it so if anyone who might read this has one of these things they could revive it for fun.
Originally I was going to redo the entire RC basically from scratch just using the arms, diffs, motor, and drive line, but changed my mind when I took a closer look at how it was designed.