After a bit of searching I found a wealth of knowledge at the AMYCA (American Model Yachting Association).
It turns out that the Star 45 is very popular and has a long history with RC Yachting.
A 45.5" hull and and a 10 lb minimum weight makes for a hefty model yacht.
Model Sail Boat: Building a 45inch Star Boat
So now with the pictures.
The first plans I found looked like this but the resolution of the jpeg was so low I couldn't read most of the dimensions.
I then found a great blog that had lots of different versions of the Star 45.
The full sized templates were already plotted to scale in pdf format.
So off to the lumberyard to get some meranti plywood and some 1/4" oak board.
Some coffee and contemplation.
Do a bit of planning.
Glue the templates to the plywood.
Make some bulkheads.
Rip the oak to make chines and battens.
Rip the planks from spruce patio decking.
Layout the frames.
Install the bulkheads.
Keelson, chines and battens.
Plank up to the chines.
Trim the planks to the chines.