I look some photos of the process I used to transfer the plans from the full sized half-patterns to my lumber.
The Glen-L plans for the Malahini show a center line you can use to mirror your plans to get both sides of the bottom and top frames.

(Notice my leather hole punch I used beside the plans in the photo above).
Using Carbon paper face up I trace the ourside contours of the frames for when I flipped over the plans.


I also used a hole punch to create some 'line up holes' so I could see the edge of my lumber below and centerline for flipping them over.

I lined up the 'setup level' line on the planed straight edge of my lumber, then used finishing nails at the corner and mid-curve location(s) of the plans to set the location for my guide.


I then lifted, flipped over, lined up the center line and straight edge and used finishing nails on the other side of the frame section.


I removed the plans, placed a 1/4"x 1/4" square cut guide and flexet to match the curve, using finishing nails on the opposite side to hold it in place while I traced the line.


On the side frames sections where I had a large enough piece of carbon paper and was not matching up the setup level (all sides curved), I put the carbon paper face down, nailed the finishing nails on the top surface, placed my flexible guide, then traced the line on-top which transfered down onto the lumber.

I worked out very accurate, pretty quick once you got the tools ready, and the finishing nails pulled out quite easily by hand (don't pound them in too deep). I ended up using a smaller 1/8" x 1/4" guide on the tighter curves of the transom frame sides, but otherwise everything was easy to line up with either one to three nails along the curve for the guide.