This is the new improved main shaft with M4 locking collar. The big M4 screw will help clamp the main shaft better to eliminate any vertical play.
1 x H0122 main Shaft
1 x H0121 M4 Locking Collar
1 x HC110 M4x25mm socket cap screw
2 x HC104 M4nx22mm socket cap screws
3 x HC212 M4 Nylon Lock Nuts