2” hole saw, the opening in the bottom of the skull is
enlarged to allow for the maximum range of motion.
Special care must be taken to align your cut properly to
avoid removing too much material around the jaw
In addition, a hole for the rod that moves the jaw must
also be drilled, along with the four mounting holes used to
attach the Plexiglas plate. The provided instructions are very
specific, so take your time, measure twice, and drill once.
The assembly of the three-axis mechanism is also fairly
straightforward, with the provided instructions being very
thorough. I recommend that you read them completely
before starting the assembly to familiarize yourself with the
process. It will go more smoothly once you see it as there
are very specific ways the brackets and servos need to be
attached (Figure 6 and Figure 7).
If the skull fits with your final character design, you
might just need to add a finish to him (Figure 8). My usual
method uses Minwax Gel Stain, and is quick and easy.
Apply it to the skull and then remove any excess with a
clean rag. There are many colors to choose from, so pick
the one that suits your needs. My favorite is the Honey
SERVO 08.2015 39
Figure 8. Kit completed and ready to be mounted
to a body.
Figure 7. The inner workings.
Figure 6. Top view of Monster Guts three-axis mechanism.