Made from an ABS tube, some wood, a galvanized shaft and an old 90 degree drill adapter. I just tighten my Ridgid battery operated drill on the top shaft and away we go at any speed or direction (in Gull lingo that means FNR
An old Mercury 7.5hp prop pushes the thing with surprising thrust.
Sold it to a Russian guy 2 months ago who wanted it on his excentric mini-sailboat!
Cheers!