George,
For an .049 size you might want to check the Shearwater also by Ken Willard from RCM 1/67...I don't have the plans but that was my first issue of RCM. I discovered it after leaving the Navy in Oct 66.
George
I have the magazine issue with the Shearwater somewhere, I know I looked at it recently. It looks like a great 1/2A waterbird.
But at 34" wingspan 238 squares.. yeah the throttled SS might be perfect! Won;t be overpowered, just "powered". Sounds fun.