Despite being 40 years old, the Revell PT-109 in 1/72nd scale is a good kit.
I made this one into the late war version. Here in front is a 37mm AA gun, ammo locker to the left and a 20mm gun to the right. Torpedo tubes were removed and ariel torpedoes were used instead. Usually they only carried two torpedoes, there were few Japanese targets worthy of a torpedo that the PTs would have to confront. I used a couple of fuel tanks with a little modification as the ariel torpedoes.
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