Bruce,
I have placed the magazine article (from March 1957 Model Maker magazine) in the thread, Vic Smeed's Model Boat designs. The article is quite basic as S.S. Hobo was a follow-on from the Painted Lady design. Painted Lady was a detailed build over three months, September, October and November 1956 and I have also posted these pages which will give a lot more information.
The forum images are quite small, if you click on the image an enlarged version is shown, which can be further enlarged.
Hope this is of help and I wish you every success with the build for your grandson.
Tony
Edited By Tony Hadley on 05/05/2018 20:46:26