Thermoformed gauntlet for an e-NABLE Phoenix or Raptor Reloaded prosthetic hand

A gauntlet that's designed to be thermoformed rather than being printed in its finished shape. A video describing how to thermoform a gauntlet is available at https://www.youtube.com/watch?v=BihhKHjguZY . This design has one row of twin slots on each side.
Thermoformed gauntlets are considered superior to the original fully 3D printed versions for the following reasons:
* They use less filament
* They're stronger, especially around the hinge which is noticeably weak in the original design
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