Yah, there's an issue with the O-ring compression. Have since addressed it. Actually I thought that I had addressed it before, but it seems that the machinists messed up, I had to get all the O-ring channels re-machined, and then they messed that up too, giving the warping issue.
Have submitted them revised plans, with different O-rings, and specified an O-ring channel size and have told them to follow it to the letter and that I'll deal with the consequences myself of if it is wrong, rather than having them second-guess me again.
The issue is variable in nature. It would seem that Joe Camel got the worst of it, but with these new plans, it should be a thing of the past, or at least reduced to total insignificance.
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