Lay out the Primary Arm Pieces as shown in the Assembly Layout image. Set unused parts aside.
Flip over pieces: 7, 10, 11, 13 & 21, 24, 25, 27
Dry-fit the arm pair and test-fit in fixture as shown in This Video
Place included polyethylene spacers between pair of shoulder joints, and between the shoulder and fixture on both sides. Add more spacers for a snug fit, symmetrically.
Tip: Apply a very thin coating of grease to the axle before assembly.
Next disassemble and lay parts back into the Assembly Layout configuration.
Clean Aluminum tube with rubbing alcohol to aid glue bond.
Apply glue and assemble Primary Arms as shown in This video
Apply glue to the arm surfaces which make contact one piece at a time as shown.
You will have approximately 1 to 3 hours work time before the epoxy starts to harden.
Epoxy set time is around 1 hour at 90F, 2 hours at 80F, 3 hours at 70F, 4 hours at 60F.
Store the Epoxy Gun in a Gallon Freezer Bag in your Freezer.
Place arms in fixture the same way as the dry-fit, with polyethylene spacers and axle/nut.
Make certain bearing balls on elbo joint are firmly seated in fixture.
Allow arms to dry overnight, or until epoxy can no longer be dented with fingernail.