Daystate AZ tuned Daystate LR90 help needed.

Daystate LR90 started leaking out the barrel.

Anyone have any idea how you split the reg/plenum from the valve? I tried clamping between wood blocks and using a wrench in the flats on the reg. Didn’t budge.

It was built by AZ. I would love to go back to non regulated. Can I just remove it?

Also, any id on the reg? Is it a Lang?

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Rest of the rifle if anyone wants to see pictures. I think Don Walker at Beeman was the one to originally do the mating of the LR90 to the FWB stock back in the day. AZ tuned and regulated it around 2015-2016. I added the lead to the stock when I got it.
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Original FWB cylinder cavity filled with lead and epoxy.

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The bedding.
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Hammer assembly.
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