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There is also a closer pic of the regulator in the "78 almost done" thread so you can see what we did to get the line on there. That ball valve with the yellow handle is also key. if you dont have that your tanks will completely drain when you disconnect the regulator. just close the valve and then remove. no lost air. that bottle is a 150 cu.ft but my homie slam runs a 300 cu.ft bottle because he can fit it.