Standard M4 normal speed gears nothing to high speed nor torqued up. Think the ratio. Is 18:1 but not sure it was as in the mechbox. It’s had a Titan basic put in it, new tapet plate (old one snapped when separating the gearbox for fps loss investigation), new nozzle and cylinder head due to fps loss testing. That’s it though. When it was all together fps dropped from 305 to 100-120fps. I found the sector tooth broken by chance when looking to see if there was an issue with the Titan settings as it looked like it was pre cocking but it wasnt