Have recently upgraded the tassels and added spokey dokeys. I fucking fly down the driveway now! You cant do this from a normal fermenter, it has to be a pressure vessel. Well worth looking into as a future upgrade. You can go the fermentasaurus option or what I have done which is getting a 50L keg, a coupler ,2 ball connects and a spunding valve. All up cost me about $100 and worth every cent.