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Not small enough. The one we custom ordered is like 6x6cm (piston itself is only 9mm,) and they even managed to make it run on DC.

The factory and their tech level truly surprised me despite them being complete nonames, who mostly do fridge part kits for local production in 3rd world countries.

This reminded me yet another time of just how underappreciated are those no-name factories. They truly are the real unsung heroes of our globalisation era.




Adding to that, the most expensive single part in all at happened to be the specialty BASF o-ring for the piston at $6 dollars...

Body, piping, insulation, every other part came at less than that




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