Fairly impressed with how this turned out.
-$5 hand vac (700w, 240ac)
-Inverter in the car (match power with vac)
I literally just whacked a hole in the side(the air vents) for the hose, then duct taped and hot glued every leaky bit to seal it.
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Not sure how this compares with the Bravo pumps (hopefully someone can post a vid of theirs), but for $6 kiwi (3 pounds) it's gotta appeal to some of you guys considering the results!