Well considering that the Hobie Outback (I purchased brand spankin new) I owned did a 10 foot radius, I figure I can do much better than Hobie, seriously.
Actually I used several methods in lining up my drive; the bottom side of the yak has a shallow arch, so one can simply turn the yak upside down, line up a chalk line with the center of the yak, clearly visible at the front and rear by it's pointy sections. I did the same on the topside, I also measured it in several ways, in addition to using a laser. Since the topside higest points are flat, it's pretty easy to use a square and bring it around the yak, i.e., bottom, top, and sides. Considering that you really need a rudder with a pedal drive, the rudder should easily compensate for any minor maladjustment; yet I'm confident in my alignment.
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