Im running Maifields setup from that site, not really much difference between any of them in my opinion. Ive driven a couple 22s and they turn in really well at any speed and can be pushed much harder than I can the 4.1. With the backyard style tracks we run here the Losi's longer chassis keeps it stable in the rough. I managed to take TQ but in the main I needed to push the 4.1 harder but it just wouldn't take it. Gonna order a T4 chassis and cut it down and see how it works out.