The Helios Gear Box (Gen III) is a re-designed upgrade.  We have solved the age-old problem with the OEM gearbox of unwanted ‘side-to-side’ movement with superior gear clusters, precision manufacturing and appropriate materials.  We even coat the gear teeth with DLC for silky smooth operation and extra long life.  This is a drop-in replacement to your OEM unit and backwards compatible for all of your tools.