The Modify Torque Up Gear Set for Tokyo Marui version 2 is now available at Airsoft GI... "The Modify Modular Torque Up Gear Set for TM Gearbox Ver.2 is a drop in gear set that is good to go right out of the bag. The gears are held together and fall right into place, this item comes with metal bushings, and no shimming is required. This is the best way to change the gears in your Version 2 and 3 gearbox and save time on shimming.