So I own a Cm16 Predator by G&G, all stock. Now it is the intermediate model, which has a "IFRIT 25000 High Torque" motor. Im currently only shooting at 320 fps. Id like to up this so I can use heavier BBs. Im goig to get inside and do my compressions, I have a new air nozzle with o ring to install. I also use a 9.6v 1600wah battery. Should I be okay to upgrade with a M120 spring?