Please find attached my interpretation of the Elco 77' Gunboat conversion in 1/200. She has two 40mm Bofors without the torpedo tubes and added 50 cal machine guns, the ultimate barge busting machine.

At least there were three converted boats: PT 59 (skipped at one time by no other than JFK) to PT 61.

Very important, before you glue the twin 50 Cal station cylinders, dry fit them to the cabin/deckhouse. These are very sensitive to the thickness of your paper. I hope you like it.