Wow, if you are that prolific a reader, you then know that I've never said or believed David couldn't get a provisional patent on features or process, just none that excludes the rest of the systems based around manufacturers built around readily identified prior art published on this forum and elsewhere.
If your reading comprehension equals your reading voracity, then you are also aware that it is my publishing the plans for the Lil Terp that upset David, not my using a pump. I may have been considered a thorn in his technique that doesn't pre-vacuum prior to injecting butane, because I consider the practice unsafe.
Since you don't believe in electric pumps, I infer you are using Dave's tried and proven technique of simply "floating" the atmosphere out, rather than evacuating the system with a vacuum pump before introducing butane.
You also seemingly missed the part about WolfWurx systems being NEMA 7, Class 1, Div 1, because they are fully pneumatic, including the vacuum pump.
I respect and applaud your choice of equipment, which sounds like exactly what you should have for yourself.
If you are offering yourself as the resident expert to judge my designs vis a vis David's, I decline to accept both your hyperbolic study, or expert status.
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