Here is a CEN Matrix I used to run as a nitro, I moved over to a Kyosho brushless buggy so I converted the CEN to brushless and gave it to my brother. RC-Monster motor mount, custom bracket to hold the Feigao motor together and a custom battery tray. Regarding the CEN, it is a good buggy for the money, durable and a decent racer, it comes stock with big bore shocks (16mm) and the Pro model has nice CNC parts. One thing to watch is the servo saver arm, many have broken this part I never broke the stock part but I replaced it with the optional CNC part just to be safe.
