Some interesting huma regulators

About the 400-500cc bottle version, I earlier contacted huma air for a lilte more information, and got this reply: 


The reg has male M18x1,5 on the input side and the same female treads on the outgoing side.

The external diameter is 32 mm and the reg has is own foster quickfill for filling.

I contacted them when I was wondering if it was possible to modify the stock (basically drill hole for the foster connector) on an unregulated fx bobcat mk1 to use this regulator. But I then found out the bobcat use a 40mm tube instead of a bottle, which have wider diameter threads inside the tube.