1975 18' sf

[dave s]

Sounds like a plan!
I would have also pulled a mold off the hull, but flipping it over would be difficult on the side of my house.

Yeah a few ways to do this.
You could also cutoff the original transom and add in the molded section to lengthen the hull.

The simplest way would be to start with a longer boat and then make an integrated bracket out of the last few feet, but I started with an 18' instead of a 20'.
Maybe the next boat I'll cut a 23' down to 21'!

Btw. It's hard to tell from the pics, but the sides of the tub are slightly tapered in, about 3 degrees; my design is more of an integrated bracket than a hull extension.
It looks like the hull has some rocker built in so my tub tapers slightly up too.