In this article, we test the effects of adding capacitors to AEG mechbox circuitry and verify that the use of capacitors is an effective means to increase rate of fire economically.
Accurately measuring your rate of fire doesn't mean you need an expensive chrono. This guide shows you how with a PC, a cheap microphone and free software, the rate of fire of any AEG can be easily determined.
Guides 
Solid State Switching With MOSFETs 
Increasing Rate of Fire with Capacitors 
Measuring Rate of Fire Through Audio Analysis