In response to requests from friends and supporters, I did a revised version of my posable hands for the DOTM leader Sentinel Prime figure, this time to be much more movie accurate and with even more detail!
Each hand is articulated at the wrist with a ball joint. The fingers each are double jointed, and even the thumbs are on ball joints.
The leader's hands are big enough for me to design it such that it can hold weapons without relying on the tension of the finger joints, so that you can pose them in many different ways with many different weapons.
Transformation is possible, I made sure of that (yay!). Just make sure the fingers are positioned in a half grip similar to how the original fingers looked.
You might face loose joints when printing with Strong Flexible material. Use light coats of superglue or similar on the surfaces of the ball joints to add thickness and sturdiness to them.
This model has been successfully tested in White Strong Flexible and I highly recommend that material.