Just duct tape it to the engine cowling.
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I'm surprised no 'jazz music' armament suggestions came up yet
P38..... Nothing...shes perfect just as she is
That sounds quite reasonable! Perhaps we could call it the Ki-100?
Come to think of it I think a stripped down Pony with the auxiliary fuel tank removed, the engine swapped with a Griffon, five blade prop, and a pair of Hispano's in place of the .50's might be interesting.
I think it would be like a Tempest