Works just as good as any engine and the fcu is built into the trigger board so you don't have to worry about wires this one comes with an updated 3d printed trigger all this one needs is a new poppet I was going to shim the other one but it broke the broken one is also in the bag and for my recommendation of getting a new poppet would be to get the polarstar fusion red poppet and if you want pair it with the polaratar red nozzle for peak air efficiency and performance and if you have any questions with this gun after you buy it I will be happy to answer I've worked with these engines quite a bit and I have screenshots of the programming sheets because I lost mine but otherwise needing a new poppet works great