Packhorse

The diaphram seals against the cap and the body not the hydrostaic transmitter. I can remove the hydrostaic transmitter and pressurise the reg with no leaks.
Am I missing something here?

Ahh I see now, you dont need it to form a seal you need it so the diaphram does not get streched and push down to far into the body at depth which would cause it to break its seal.

So does the tecme part replace the diaphram or the hydrostaic transmitter?
If its the hydrostaic transmitter then you could use any disk to do it as it does not need to seal.

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