Hex Trios

Hex Trios, by Eric Fuller & Matt Dawson.

Matt Dawsons "Ambidextrous HexDuos" IPP exchange puzzle in 2010 involved two boxes that interact with each other during the solve.

Inspired by HexDuos, Eric designed these HexTrios boxes to be stronger, more production-friendly, and more difficult. Much more difficult!

The resulting HexTrios are identical in dimension, but each has a different mechanism. 

Wood types used: Maple, Purpleheart, Yellowheart, Goncalo Alves

Size of each box: 2 x 2 x 2 inches.

These boxes have been solved twice and were always stored in their cardboard boxes.
They never saw as much sunlight as the day these pictures were taken.

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Please note:
I am currently auctioning 30 (mostly) metal puzzles on behalf of a puzzling friend who no longer collects puzzles.
The puzzle(s) will be sent from the Netherlands (Eindhoven), or delivered in person at an MPP or DCD or IPP.
Please pay via Wise(international) or IBAN(EU) or cash(at MPP/DCD/IPP), other options can be discussed.
Insured shipping cost estimate is €20 within EU or €40 outside EU.