Sounds delicious, doing a Swiss Cheese mod on your piston as shown by Airsoft Reviews HD in the second episode of their Airsoft Tech series... "On this episode we talk about the swiss cheese mod on AEG pistons. We discuss the pros and the cons of this modification and finally we show you how you can do it yourself! Stay with us for more technical videos. Subscribe and share our videos. Also you can leave a comment above with suggestions and technical questions! Will be happy to answer you through our next videos!"