And don't forget the shaving cream. If you want to find a leak you can't hear, you can't beat it. You just spray it around the vacuum connections and if there is a leak there it gets sucked in.
FYI on the orientation of hose clamps. Tests have shown it makes no difference in how the two screw sections of the clamps are located in relation to each other as to the quality of the seal. But if space on the nipple is limited, having them located 180 degs from each other can allow you to get them closer to each other and up on the nipple.
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