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I have a project coming up that will be a 3/4 inch scale PT boat. It will be modelled after the PT -103. The only mechanical work really being done will be the manufacture of a wet gear box dealing with a 1.2electric motor input to three output shafts with an adjustable ratio on the input

so far you look like you are doing good. Minor suggestion on your valves. Over the years I have found t6hat you want to change position of the valves as little as possible. I have used drill rod for mine and have never had as problem. In one setup you can do the OD, do the root radius The keeper...

the unknown engine casting set is I believe the Breisch New Holland casting set

Nice looking model and looks nicely done. I built one of the prototypes for Jim and wrote the article for the March 1995 issue of Gas Engine Magazine. I do hope you plan to paint it when you are finished. One thing I have always done was to use a two part (Imron) paint on my models. I started...