I had to take apart as wasn’t working to find the slider had snapped along with plastic on wheel to had split , thankfully I had these from old gearbox and was able to get firing as gears are good,was going to complain but left too long before I tested
![[SHS] Low Noise High Torque Gear Set for Gearbox V2/3 [100:300]](http://www.sixmm.com/cdn/shop/products/SHS_LowNoiseHighTorqueGearSetforGearboxV23_100300.jpg?v=1638197364&width=950)