Hmm, Wetaz can not only can point higher but also navigate thru forum mysteries with pizazz – thank you for adding to my technical data bank.
The second image of the yellow transom should have a title and comment with words to the effect of Grip ties around pipe and transom have been removed. I also use a shock cord attached to the aft anchor point and around the base of the pipe to make the Go Pro mount very stable.
The first photo should be clear and shows the flattened pipe which corresponds to the transom dims. I used a butane flame to soften. The softening needs a little patience and a good eye to make sure both flats are parallel.
