MGM160/7xl/G-Maxx chassis

[RC-Monster Mike]

The shrinked screws come with all motor heatsinks, but if a motor is ordered at the same time, I tape the proper size screws to the package as well. For the 7xl, I include 20mm or 25mm screws. 22mm would probably be the ideal size(but I don't have this size!).
You may get less runtime, depending on your gearing. The performance/runtime work together. If you gear lower, your runtime will increase and your top speed will decrease.