Shoulder Drive Assembly
Attach Satellite Motor to the Hex Standoff's via quantity 4, #10-32UNF x 1/2" Long Phillips Pan Head Screws
with #10 Lockwashers.

Shoulder Drive Assembly
Install quantity 4 Bronze Flanged Bushings into the Shoulder Mounting Plate
1/2" inside diameter x 5/8" outside diameter x 1/2" Long
7/8" Flange outside diameter x 1/8" thick
McMaster Carr Part Number: 6338K418
These bushings should slide freely in the slots.
I used some grease to hold the Bushings into place

Shoulder Drive Assembly
Attach the Shoulder Hub to the Outer Legs via quantity 4, Hex Socket Shoulder Screws
1/2" diameter shoulder x 2" long, 3/8-16UNC Thread x 5/8" Long
Slide the Shoulder Screws through the Outer Leg and slide the Shoulder Hub over the Shoulder Screws
using the quantity 4 smaller 1/2" diameter holes in the Shoulder Hub
The other holes are there just for weight reduction

Shoulder Drive Assembly
Attach the Outer Leg and Shoulder Hub to the Motor Assembly
You will have to hook your satellite motors up to a 12 Volt Battery
so you can align the Motor Hub mounting holes to the Shoulder Screws
Tap the Motor wires to the Battery till the quantity 4 threaded holes in the Motor Hub
line up with the bronze bushings
All the holes should now line up at 12,3,6 & 9 O'Clock

Shoulder Drive Assembly
Tighten the Shoulder Screws until you see the thread of the Shoulder Screw
slightly protrude from the backside of the Motor Hub
It's helpfull to have an extra set of hands when aligning everything up
Do Not tighten one screw and move onto the other
Alternate tightening

Shoulder Drive Assembly
This is the tricky part to get everything to line up
Take your time, at this point you don't want to strip any threads

Shoulder Drive Assembly
Installed!

Shoulder Drive Assembly
Now you can rotate your Droid 38 degrees

Shoulder Drive Assembly
Grab one +Positive wire from one motor and grab one -Negative wire from the other motor and twist them together
And do the same with the remaining two wires. This will allow the motors to rotate in the same direction
These motors actually rotate nicely together
No one motor turns faster than the other
My Droid is fairly heavy and these motors have no problem rotating it.
Now have fun rotating your Droid!