"This MOSFET system is amazing. Paired with the jg 23000rpm high torque motor and jg high speed gears, and an 11.1v 20c 2000mah Lipo, the trigger response is awesome. I pull an m130 for my upgraded agm m4 easily. My friends say I can only use semi because I am too over powered. Even in semi I can shoot relatively fast because of this trigger response. Only con is that it was a bitch to install. I tried, but sent it to a technician, and even he said it was hard to get in. Might be just mine, but do not let that turn u off."