Welcome back to the Poseidon Forum!

[rsingler]

Perhaps consider a sink tuning check:
Hold the pressurized reg with the purge cap vertical (that'll put the case at about a 45° angle with the mouthpiece up). The reg should give a tiny hiss before the sink surface touches the lower necklace ring and a full fledged blast should start before the water reaches the side of the mouthpiece. Those are 1.1-1.6" from the center of the diaphragm, and equal your "cracking effort". That's not really the right term, since the servo valve opens earlier, but it'll do.

If it doesn't hiss until above the top green line, you're reg need retuning.

 

[grantmac]

They are Jetstreams so a little different. I've checked that with them horizontal which might be giving me a higher cracking pressure.

 

[rsingler]

Sure! You can do exactly that with the Jetstream. Just submerge with the diaphragm horizontal and measure how far you have to insert it before the reg goes from a tiny hiss to a full flow. You may need a mouthpiece on it to keep it from flooding as you submerge it.
But the seam between the faceplate and the case shouldn't have to go more than 1.25" below the surface before it hisses, and more than 1.5" before it really opens up.
In my experience, 90% of the dissatisfaction with the servo design is a combination of
1) too high an IP, and
2) too stiff a tune.
It can be a magical breather, but what you've described is unfortunately common, due to poor technique by the shop and poor instructions in some versions of the manual. We're working on that, but Sweden can be a little resistant to change.