Return to the BUILD

“Assemble the thumb and connect it to the hand, and attach a large ball joint to the wrist.”




Materials: The Left Thumb parts are metal, but the fingertip (84-3) and the rest of the parts are plastic.


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Construct the Left Thumb

Step 1

Lay out the Left Thumb Parts and Left Thumb Tip, as shown:

Steps 2-6
  • Fit a Plastic Sleeve over a Finger Joint Connector
  • Then, fit the connector through the holes of the first knuckle junction, joining the Left Thumb Parts
  • Dab a little super glue on a Finger Joint Pin and and fit it into the end of the Finger Joint Connector, securing the joint
  • Repeat this process from the other side on the next knuckle
  • Repeat this process one more time from the other side on the last knuckle
  • Super glue the Left Thumb Tip on the end of the Left Thumb Parts

As I did with the right hand, I am replacing all of my finger joints with the Finger Mod from Model Modz. You can check out my dedicated page on how this mod is installed HERE. Therefore, I did not complete the original steps. Here is my modded finger:

Steps 7-8

Fit the two halves of the Left Wrist Ball Joint together and secure them with one (1) PB 2×6 mm screw, as shown.

The PB screws have wide/coarse threads and a rounded pan head:

Step 9

Retrieve your Left Hand assembly from the previous issue. Fit the locating pin on the square end of your Left Thumb into the matching alignment hole at location of the Left Hand, aligning the larger screw hole as well:

Step 10

Secure the Left Thumb into place with one (1) KM 2×6 mm screw.

The KM screws have fine/narrow threads and a conical countersunk head:

Step 11

Apply a bit of super glue to the base of the Left Wrist Ball Joint assembly and fit it to the matching hole of the Left Wrist, as shown:

The post and hole here have flattened sides to help keep the ball joint from rotating, but you will need to hold them tightly anyway:

Step 12

Secure the ball joint to the Left Hand with one (1) KB 2×6 mm screw.

The KB screws have wide/coarse threads and a conical countersunk head:


Whew! Thankfully, that was the last finger to build. Now we can move on to finishing the left arm.

Next Up

 Issue 85 – Left Leg Joint Section, Left Hand Muscle Connectors, Lower Arm Shaft

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