OK, having finally got round to installing the piston enhancement parts from Partworkupgrades.com, here are my thoughts.
This is what arrived, all in a small box to prevent damage during transport. The four tubes that replace the small ankle piston's rubber seals, the two smaller diameter head pieces for the larger ankle pistons, and the largest diameter for the waist pistons (On the outsides in the picture.)
Overall, I'm impressed with the parts. Although noticeably FDM 3D printed, they seem well made with no gaps in between the layers.
Firstly, as I have only received issues up to the right foot, I set one set of these aside for the left foot. The other set I am retro-fitting on him now. It will be easier to fit the ones on the left leg as that is assembled.
To start, I removed the lower leg just below the knee by removing the single screw.
This is necessary to get at the larger central piston at the rear of the leg.
After removing the piston from the leg, you will need to get the top cap off the piston (the one on the larger end.). Even though I had lightly glued mine, it came off with little trouble, using my scalpel blade to just crack the glue at the join, then levering the cap off with a small metal ruler.
With the piston disassembled the upgrade part is ready to be fitted.
Insert the rod into the piston body like this.
Then glue the upgrade part onto the end of the piston. The end of the piston rod should sit inside the upgrade part with the upgrade part sitting inside the piston body.
Once the glue has dried thoroughly, you can then replace the cap on the piston body and re-attach the piston to the leg.
Remove the smaller piston rods from their piston bodies, then remove the screw and rubber cap from the end. These are no longer required and can be disposed of. One of mine had split due to me tightening too much trying to get it to touch the sides of the piston body, showing how loose these were.
Glue one of the upgrade sleeves over the end of the piston rod, enduring it has gone all the way down the piston rod.
These can now be re-inserted into their piston bodies and prepared for attachment to the foot again.
With all the pistons re-attached to the foot, the rods maintain a much straighter angle down the back of the leg, even with the leg laid down on its front - unlike before the installation.
With the first leg corrected, my attention turned to the waist. Here we also need to remove the pistons.
Pull the piston out of the pelvis, and leave it hanging.
With him lying on his back, you will need to remove the circled screws. This will in turn allow the sockets for the top of the pistons to be parted enough to remove them.
Remove the single screw that joins the two halves of the ball joint together, and allow the rod to fall out. The initial installation of the rod was up and through the body, but after installation of the upgrade part this will no longer be possible.
Glue the upgrade part into the piston rod like so. Again, make sure the rod is all the way into the upgrade part.
The piston can then be inserted down through the piston body like so. All that remains now is to replace the ball joint on top of the piston and secure it with the screw.
Repeat this for the other side, and replace both pistons into the body, replacing all the screws to re-tighten the Thoracic cage with the pistons back inside.
Reconnect the smaller ends of the pistons to the pelvis, and the job is done.
Although these mods are not seen on the finished model, the effects are noticeable. The affected pistons no longer droop, and whilst they are not improved in strength, they at least look like they are capable of supporting the structure now.
It is a shame that Hachette did not think of this during the planning of this model. A small injection moulded frame with these parts on it could have been manufactured for a few pence and added into an issue with very little for the modeller to do.
As it is, we have to rely on companies like Partworkupgrades (Who also make a scaled plasma rifle, and some full size chips from the films) to pick up the slack. They have my heartfelt thanks and a hearty recommendation to anyone doing this build.
Current Builds
Eaglemoss: Ecto-1, BTTF Delorean [Installing Mods]
Hachette: T800 Endoskeleton
Agora Models Shelby Cobra 427 [Plate 031]
BanDai 1:5000 Imperial Star Destroyer
AMT 1991 U.S.S. Enterprise Bridge [Installing Mods & Lights]
Finished Builds
Deagostini: R2-D2 [Never getting batteries]