One little mod that I will mention I dont recommend doing unless you suffer really badly from a flat spot when you are doing a burnout and opening the secondary's and shutting them quickly on and off. In the picture you will see a small hole, what this does is let fuel run into the small fuel storage area for the tubes that feed the first part of fuel delivered to the secondary's. Due to time filling up you may encounter a very small flat spot with on off full throttle driving due to this small resiviour not having enough time to refill. You can drill this hole out larger BUT BUT BUT in doing this if you are drag racing under full throttle and the hole has been drilled to large your main fuel supply from the bowel is being upset as the fuel now wants to move towards these holes instead of the secondary's jet holes. IF you do decide to modify this due to the mentioned flat spot go in very small incriments with drill sizes.
